Eastern Mojave Vegetation
Images -- Species - Poaceae

By Tom Schweich


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Images are organized by the topics listed at left. Click on a topic name to see images with that topic.

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Habitat of three common grasses in Windy Saddle Park

Photographed 24 July 2015.

The three grasses are: Bouteloua gracilis, B. curtipendula, and Aristida purpurea.

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Achnatherum robustum

Coll. No. 1493, Achnatherum robustum

Photographed 5 January 2017.

Coll. No. 1493, 13 Jul 2016, characters observed: Perennial grass, to 1.3 m., non-rhizomatous bunch grass; Leaves, sheath open, ligule membraneous, tuft of hairs abaxially, blade flat, upper 15 cm.; Inflorescence, panicle, 30 cm. × 2.5 cm.; Spikelets, 1 per node; Florets, 1 per spikelet, bisexual; Glumes, #2, lower, 8 mm. + awn 2.5 mm., veins, #3, thin, upper, ±similar; Disarticulation, above the glumes; Callus, sharp, 0.2 mm.; Lemma, enclosing grain, 6 mm. + awn 26 mm., twisted, short (0.1 mm.) hairy, color tan, tuft of hairs at base, middle sparse hairy, tuft of hairs at tip, lengths ±similar; Palea, 4 mm., hairy; Anthers, #3.

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Aegilops cylindrica

Inflorescence of Coll. No. 1139, Aegilops cylindrica

Scanned 14 October 2015.

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Inflorescence of Coll. No. 1139, Aegilops cylindrica

Scanned 14 October 2015.

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Agropyron cristatum

Habitat of Agropyron cristatum near June Lake.

Photographed 30 May 2012.

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        images/IMG30217sm.jpg

Coll. No. 821, Agropyron cristatum

Photographed 26 January 2013.

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Coll. No. 821, Agropyron cristatum, "Crested Wheat Grass"

Photographed 30 May 2012 … although, the infloresence is much tighter than the illustration in TJM2 would suggest.

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Agrostis stolonifera

Roots of Coll. No. 1515, Agrostis stolonifera

Scanned 12 January 2017.

Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. Northern part of open space, 1.6 mi. west on CO Highway 72 from CO Highway 93, north 1.9 mi. on Plainview Road, then 300 m. northeast, almost to the boundary fence; 16.3 km. north northwest of the GNIS location of Golden. 39.8991°N, 105.2668°W. WGS 1984 Elev. 1937 m. Weakly stoloniferous, growing in and beside ephemeral stream. Introduced.

Coll. No. 1515, 24 July 2016, characters observed: Perennial grass, to 85 cm., decumbent at base, weakly rhizomatous, 1 of 3 collections has a 2.5 cm. scaly rhizome; Leaves, sheath, open, ligule 4 mm., chartaceous tissue extending down sheath 20 mm., auricles, 1 mm., blade, 80 mm. × 3.2 mm. wide, flat, scabrous adaxially; Inflorescence, panicle, branches not bearing spikelets to base; Spikelets, 1 floret; Glumes, ±equal, 2.3 mm., purplish, keeled scabrous; Lemma, 1.8 mm. + awn 0.3 mm., thin, translucent, veins, 3(5?); Palea, 1.3 mm. Introduced.

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        images/TAS015150Roots.jpg

Coll. No. 1225, Agrostis stolonifera

Scanned 14 December 2015.

Coll. No. 1225, 16 Jul 2015, characters observed: Perennial grass, to 1 m., no sign of either rhizomes or stolons; Stem, nodes green; Leaves, sheath, open, glabrous at summit, ligule, membraneous, 4 mm., angled, auricles, 0 (double fold of proximal blade margin), blade, 85 mm. × 3.8 mm. wide, scabrous abaxially; Inflorescence, open panicle, 18 cm. × 14 cm. wide, deltate; Spikelets, 1 per node, on 1°-3° panicle branches, axis not extended beside or above floret; Glumes, #2, 2.2 mm., ±equal, keeled, scabrous on keel, veins 1, awns 0, purplish; Disarticulation above the glumes; Florets, 1 per spikelet, bisexual; Lemma, 1.8 mm., transparent, except 3 green veins, awns 0; Palea, 1.5 mm.; Anthers, #3, 1.4 mm., tan with purple abaxially.

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Coll. No. 1515, Agrostis stolonifera

Photographed 12 January 2017.

Ranson/Edwards Homestead Open Space Park, Jefferson County, Colorado. Northern part of open space, 1.6 mi. west on CO Highway 72 from CO Highway 93, north 1.9 mi. on Plainview Road, then 300 m. northeast, almost to the boundary fence; 16.3 km. north northwest of the GNIS location of Golden. 39.8991°N, 105.2668°W. WGS 1984 Elev. 1937 m. Weakly stoloniferous, growing in and beside ephemeral stream. Introduced.

Coll. No. 1515, 24 July 2016, characters observed: Perennial grass, to 85 cm., decumbent at base, weakly rhizomatous, 1 of 3 collections has a 2.5 cm. scaly rhizome; Leaves, sheath, open, ligule 4 mm., chartaceous tissue extending down sheath 20 mm., auricles, 1 mm., blade, 80 mm. × 3.2 mm. wide, flat, scabrous adaxially; Inflorescence, panicle, branches not bearing spikelets to base; Spikelets, 1 floret; Glumes, ±equal, 2.3 mm., purplish, keeled scabrous; Lemma, 1.8 mm. + awn 0.3 mm., thin, translucent, veins, 3(5?); Palea, 1.3 mm. Introduced.

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Andropogon gerardii

Dissected spikelet pair of Coll. No. 1060, Andropogon gerardii

Photographed 4 June 2015.

Coll. No. 1060, 28 Aug 2014, characters observed: Perennial, to 85 cm., clumped, rhizomes unknown; Leaves, blade and sheath differentiated; Sheath, 11 cm., open; Ligule, membraneous (though surrounded by hairs), 3 mm., auricles 0; Blade, soft, flat, 27 cm., hairy near ligule; Inflorescence, 80 mm., > leaves, 1-2 per stem, in 5-6 digitate branches, spikelets many; Rachis, soft bristles on margins and at nodes; Disarticulation at nodes of rachis; Spikelets in pairs, Sterile spikelet, 7 mm., pedicel 4.5 mm.; Fertile spikelet, Florets #1, Glumes, awns 0, ±equal, lower keeled, upper flattened and grooved; Lemma, 6 mm., membraneous, rolled, glabrous, tip 2-forked, awn, #1, 13 mm., bent, twisted, attached on back; Stamens, 3; Anthers, yellow; Ovary, glabrous; Stigma, feathery.

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Spikelets of Coll. No. 1265, Andropogon gerardii

Scanned 7 January 2015.

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Inflorescence of Coll. No. 1265, Andropogon gerardii

Scanned 7 January 2015.

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Andropogon hallii

Coll. No. 1060, Andropogon hallii

Photographed 28 August 2014.

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Aristida purpurea

Coll. No. 1140, Aristida purpurea

Photographed 9 June 2015.

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Aristida purpurea longiseta

Coll. No. 1140, Aristida purpurea var. longiseta

Scanned 15 October 2015.

Coll. No. 1140, 9 Jun 2015, characters observed: Perennial grass, 20 cm. when collected, possibly elongating in maturity; Inflorescence, panicle, branches not pulvinate, i.e., no swelling at bases of pedicels; Axis ±straight; Pedicels, stiff, ±straight; Spikelets with 1 floret; Glumes, 2, lower, 11 mm., veins 1, upper, 20 mm.; Lemma, 11 mm., smoothly transitioning to awns without twisted column, apex 0.4-0.6 mm. wide, awns, 3, 58 mm., straight.

Determined var. longiseta per length of upper glumes and dimensions of lemma.

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Avena fatua

Coll. No. 812, Avena fatua

Scanned 15 Jun 2013.

Coll. No. 812, 8 Apr 2012, characters observed while keying: Annual, to 100 cm; Roots fibrous; Stem herbaceous; Internodes hollow; Leaf blade and sheath differentiated; Sheath open; Blade soft, margins glabrous; Inflorescence many, panicle, > leaves; Spikelets many on 1° and 2° branches, 20-25 mm.; Florets 3 per spikelet; Glumes present, ±equal, veins 9, awns 0; Axis hairy on abaxial side; Callus bearded; Lemma 10-12 mm, rounded, veins >= 5, tip 2-forked, awns 1, attached at middle, 15 + 25 = 40 mm, single bent, twisted below, straightening when wetted; Palea, ±< lemma, glabrous, margins ciliate; Ovary hairy.

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        images/TAS008120Flo.jpg

Blepharoneuron tricholepis

Blepharoneuron tricholepis (Torr.) Nash

Scanned 26 September 2014.

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Blepharoneuron tricholepis (Torr.) Nash

Scanned 26 September 2014.

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        images/TAS010650Floret.jpg

Blepharoneuron tricholepis (Torr.) Nash

Scanned 26 September 2014.

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Bouteloua curtipendula

Coll. No. 1241, Bouteloua curtipendula

Photographed 24 July 2015.

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Coll. No. 1241, Bouteloua curtipendula

Scanned 20 December 2015.

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        images/TAS012410Infl.jpg

Bouteloua gracilis

Coll. No. 1242, Bouteloua gracilis

Scanned 20 December 2015.

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        images/TAS012420Oview.jpg

Habitat of Coll. No. 1227, Bouteloua gracilis

Photographed 20 July 2015.

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Bromus diandrus

Coll. No. 826, Bromus diandrus

Scanned 8 June 2012.

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Bromus inermis

Coll. No. 1113, Bromus inermis, characteristic fold on leaf blade.

Scanned 7 September 2015.

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Coll. No. 1113, Bromus inermis, auricles absent, or very much reduced.

Scanned 7 September 2015.

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Habitat of Coll. No. 1219, Bromus inermis

Photographed 17 July 2015.

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Inflorescence of Coll. No. 1113, Bromus inermis

Scanned 8 September 2015.

As the inflorescence matures, it will open somewhat, and become lighter colored.

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        images/TAS011130Infl.jpg

Bromus japonicus

Coll. No. 1207, Bromus japonicus

Scanned 6 December 2015.

Coll. No. 1207, 13 Jul 2015, characters observed: Annual grass, to 40 cm.; Leaves, sheath, 60 mm. closed + 12 mm. open, pilose (but not densely so), ligule, membraneous, + some hairs, blade, hairy; Inflorescence, panicle, >leaves; Pedicel, 20 mm.; Spikelets, 1-3 per panicle branch, 22 mm. × 6 mm. wide, elliptical, drooping; Glumes, #2, <lowest floret, lower, 4.5 mm., veins 3, upper, 5.5 mm., veins 5; Rachilla, short hairy; Callus, glabrous; Florets, #12, 2-ranked, closely held hiding rachilla; Disarticulation between florets; Lemma, 8 mm. × 4 mm. wide, margin, hyaline, 0.5 mm., tip bifid, awn, #1, 5-12 mm. long, mid-spikelet awns longest, flattened at base, not twisted, attached near bifid tip.

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Coll. No. 1207, Bromus japonicus

Photographed 13 July 2015.

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Coll. No. 1461, Bromus japonicus

Photographed 20 December 2016.

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        images/IMGQ3484sm.jpg

Coll. No. 1207, Bromus japonicus

Scanned 6 December 2015.

Coll. No. 1207, 13 Jul 2015, characters observed: Annual grass, to 40 cm.; Leaves, sheath, 60 mm. closed + 12 mm. open, pilose (but not densely so), ligule, membraneous, + some hairs, blade, hairy; Inflorescence, panicle, >leaves; Pedicel, 20 mm.; Spikelets, 1-3 per panicle branch, 22 mm. × 6 mm. wide, elliptical, drooping; Glumes, #2, <lowest floret, lower, 4.5 mm., veins 3, upper, 5.5 mm., veins 5; Rachilla, short hairy; Callus, glabrous; Florets, #12, 2-ranked, closely held hiding rachilla; Disarticulation between florets; Lemma, 8 mm. × 4 mm. wide, margin, hyaline, 0.5 mm., tip bifid, awn, #1, 5-12 mm. long, mid-spikelet awns longest, flattened at base, not twisted, attached near bifid tip.

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        images/TAS012070Spikelet.jpg

Bromus tectorum

Coll. No. 1112, Bromus tectorum

Scanned 6 September 2015.

Coll. No. 1112, 26 May 2015, characters observed: Annual grass, to 30 cm.; Leaves, Sheath, 50 mm., closed proximal ⅔, open distally, Ligule, membraneous, 1 mm.; Blade, 60 mm.; Inflorescence, open panicle, rachis and pedicels short hairy, Spikelets, 1 per node, 15 mm., laterally compressed; Glumes, 2, sparsely hairy, margins scarious, lower, 2.3 mm., veins indistinct, upper, 4.5 mm. Callus, glabrous, very short, Florets, ±6, Lemma, 6.5 mm., 0.7  from mid-vein to margin, back rounded, sparsely hairy, tip, forked, teeth 1 mm., awned from near tip, awn, 5-7 mm.; Anthers, 3, 0.4 mm. Dimensions are small for B. tectorum, perhaps because of the early date of collection.

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Coll. No. 825, Bromus tectorum

Scanned 16 Jun 2013.

I had keyed this out at B. carinatus, but it has since been annotated as B. tectorum.

Coll. No. 825, 30 May 2012, characters observed while keying: Perennial, to 40 cm.; Roots fibrous; Stem herbaceous; Internodes hollow; Leaf blade and sheath differentiated; Sheath closed; Ligule membraneous, 2 mm.; Blade flat, to 4 mm wide, short hairy, margin sparse wavy hairy; Inflorescence 3-many, 10-12 cm., panicle, branching evident, longest branch 25 mm., > leaves, spikelets many; Compression lateral; Spikelets similar, 1 / node, 1° and 2° branches, length 30-35 mm., 5-6 florets; Florets 2+ bisexual; Glumes lower 7 mm., upper 10 mm., margins thin translucent, upper glume has 3 prominent veins (keeled), awns 0; Lemma, lower 12 mm., keeled, veins = 3 or 7, outer 2 appear doubled, tip 2-forked, awns 1, 13 mm, straight, attached to back at 9 mm.; Palea, 8 mm, < lemma, keel hairy, margin ciliate; Anthers 3, 0.7 mm., brown; Ovary 5 mm., glabrous below, hairy near tip.

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Cortaderia selloana

Pampas grass and Coyote bush in Jean Sweeney Open Space Preserve.

Photographed 13 July 2013.

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Habit of Pampas grass (Cortaderia selloana)

Photographed 16 July 2013.

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Dactylis glomerata

One-sided inflorescence of Coll. No. 1418, Dactylis glomerata

Scanned 6 December 2016.

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Coll. No. 1111, Dactylis glomerata, one panicle branch.

Scanned 3 September 2015.

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Typical appearance of Coll. No. 815, Poaceae Dactylis glomerata

Photographed 15 May 2012.

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Distichlis spicata

Coll. No. 839, Distichlis spicata

Scanned 18 February 2013.

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Coll. No. 765, Distichlis spicata

Scanned 20 Jan 2012.

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Coll. No. 48, Distichlis spicata

Scanned 8 June 2012.

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Coll. No. 879, Distichlis spicata

Scanned 10 July 2013.

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Echinochloa muricata microstachya

Coll. No. 1061, Echinochloa muricata var. microstachya

Photographed 6 June 2015.

Coll. No. 1061, 28 Aug 2014, characters observed: Annual grass, to 80 cm.; Roots, fibrous; Leaves, blade and sheath differentiated; Blades, soft; Sheath, open; Ligule, absent Blade, flat, glabrous, margins scabrous; Inflorescence, 1 per stem, to 8 cm., 5-8 branches, branches 15-45 mm.; Rachis, winged; Spikelets, similar, borne singly, 3 mm. × 1.6 mm. wide, margins, short hairy; Glumes, lower absent, upper, 1.0-1.5 mm., margin barely ciliate; Lemma, 3 mm., >. glumes, ovate, margin hairy, tip, acute, not withering, not differentiated from the body, awn 0-1.8 mm., sterile lemma hairs slightly pustulate; Fruit, greenish-yellow.

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        images/IMGQ0737sm.jpg

Coll. No. 1061, Echinochloa muricata var. microstachya

Photographed 6 June 2015.

Coll. No. 1061, 28 Aug 2014, characters observed: Annual grass, to 80 cm.; Roots, fibrous; Leaves, blade and sheath differentiated; Blades, soft; Sheath, open; Ligule, absent Blade, flat, glabrous, margins scabrous; Inflorescence, 1 per stem, to 8 cm., 5-8 branches, branches 15-45 mm.; Rachis, winged; Spikelets, similar, borne singly, 3 mm. × 1.6 mm. wide, margins, short hairy; Glumes, lower absent, upper, 1.0-1.5 mm., margin barely ciliate; Lemma, 3 mm., >. glumes, ovate, margin hairy, tip, acute, not withering, not differentiated from the body, awn 0-1.8 mm., sterile lemma hairs slightly pustulate; Fruit, greenish-yellow.

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Coll. No. 1296, Echinochloa muricata var. microstachya

Photographed 20 January 2016.

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Coll. No. 1061, Echinochloa muricata var. microstachya, with awned lemmas.

Photographed 6 June 2015.

Coll. No. 1061, 28 Aug 2014, characters observed: Annual grass, to 80 cm.; Roots, fibrous; Leaves, blade and sheath differentiated; Blades, soft; Sheath, open; Ligule, absent Blade, flat, glabrous, margins scabrous; Inflorescence, 1 per stem, to 8 cm., 5-8 branches, branches 15-45 mm.; Rachis, winged; Spikelets, similar, borne singly, 3 mm. × 1.6 mm. wide, margins, short hairy; Glumes, lower absent, upper, 1.0-1.5 mm., margin barely ciliate; Lemma, 3 mm., >. glumes, ovate, margin hairy, tip, acute, not withering, not differentiated from the body, awn 0-1.8 mm., sterile lemma hairs slightly pustulate; Fruit, greenish-yellow.

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        images/IMGQ0740sm.jpg

Elymus canadensis

Coll. No. 1237, Elymus canadensis

Scanned 17 December 2015.

Coll. No. 1237, 20 Jul 2015, characters observed: Perennial grass, to 1.2 m.; Inflorescence, terminal spike, 20 cm. × 5 mm. wide, drooping; Spikelets, sessile, 2 per node, 15 mm. × 5 mm. wide (excluding awns), ascending; Glumes, #2, body 10 mm. × 1 mm. wide + awn 15 mm. = 25 mm., veins 5?, entire, scabrous; Florets, #5, bisexual; Rachilla, short hairy; Callus, glabrous; Lemma, 13 mm., veins 5, rounded, hairy, awns, #1, 22 mm.; Palea, 9.5 mm.; Stamens, #3, 4 mm.

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        images/TAS012370Infls.jpg

Coll. No. 1237, Elymus canadensis

Scanned 17 December 2015.

Coll. No. 1237, 20 Jul 2015, characters observed: Perennial grass, to 1.2 m.; Inflorescence, terminal spike, 20 cm. × 5 mm. wide, drooping; Spikelets, sessile, 2 per node, 15 mm. × 5 mm. wide (excluding awns), ascending; Glumes, #2, body 10 mm. × 1 mm. wide + awn 15 mm. = 25 mm., veins 5?, entire, scabrous; Florets, #5, bisexual; Rachilla, short hairy; Callus, glabrous; Lemma, 13 mm., veins 5, rounded, hairy, awns, #1, 22 mm.; Palea, 9.5 mm.; Stamens, #3, 4 mm.

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        images/TAS012370Spklt.jpg

Elymus cinerarius

Clump of Elymus cinerarius on the north shore of Mono Lake

Photographed 24 June 2015.

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        images/IMGQ1125sm.jpg

Elymus cinereus

Collection No. 476, Great Basin Wild Rye

Photograph taken 26-Jun-07.

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        images/IMG_1793sm.jpg

Coll. No. 476, Elymus cinereus

The grid spacing is 1/4 inch.

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Coll. No. 1169, Elymus cinereus

Scanned 2 November 2015.

Coll. No. 1169, 24 Jun 2015, characters observed: Perennial bunch grass, to 1 m., of high-altitude desert, caespitose (non-rhizomatous); Nodes, (densely?) pubescent; Leaf, short hairy throughout, sheath, 22 cm., open, ligule, 3 mm., auricles, ? (I don't see any), blade, 32 cm., flat; Inflorescence, 15 cm. × 15 mm., 2-ranked, not branched; Rachis (axis), short hairy, assumed to remain intact with age (not disarticulating at flowering or after drying), internodes, 6 mm.; Spikelets, many, all similar, 2 per node, sessile, 20 mm., bisexual; Compression, lateral; Glumes, #2, awn-like, ±equal, 12-13 mm.; Lemma, 10 mm., awn 1 mm.; Palea, 10 mm.; Anthers, 6.7&mnsp;mm.

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        images/TAS011690Infl.jpg

Pubescent node of Coll. No. 1169, Elymus cinereus

Scanned 2 November 2015.

Coll. No. 1169, 24 Jun 2015, characters observed: Perennial bunch grass, to 1 m., of high-altitude desert, caespitose (non-rhizomatous); Nodes, (densely?) pubescent; Leaf, short hairy throughout, sheath, 22 cm., open, ligule, 3 mm., auricles, ? (I don't see any), blade, 32 cm., flat; Inflorescence, 15 cm. × 15 mm., 2-ranked, not branched; Rachis (axis), short hairy, assumed to remain intact with age (not disarticulating at flowering or after drying), internodes, 6 mm.; Spikelets, many, all similar, 2 per node, sessile, 20 mm., bisexual; Compression, lateral; Glumes, #2, awn-like, ±equal, 12-13 mm.; Lemma, 10 mm., awn 1 mm.; Palea, 10 mm.; Anthers, 6.7&mnsp;mm.

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        images/TAS011690Node.jpg

Elymus elymoides californicus

Coll. No. 989, Elymus elymoides var. californicus

Photographed 26 February 2015.

Coll. No. 989, 20 July 2013, characters observed while keying: Perennial, to 30 cm., clumped, rhizomed; Roots, fibrous; Rhizomes, fibrous, appearing much like roots; Stem, herbaceous; Internodes, hollow; Leaf blades and sheath differentiated, soft; Inflorescence, spike (unbranched central axis), spikelets many; Compression, unremarkable; Disarticulation, infl. axis below glumes; Spikelets, similar, 2-ranked, 2 per node, sessile; Florets, 2+ per spikelet; Glumes, 2, reduced to awns, 45 mm., upper and lower ±equal, entire; Lemma, glabrous, awns 1, 40 mm., straight to bent in maturity/dryness; Palea, veins extended as short bristles.

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  • Inyo Forest Road 01S91 “Old Stationhouse Road,” Mono County, California: at wash.
  • Field Notes: Coll. No. 989.

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Elymus elymoides elymoides

Coll. No. 1154, Elymus elymoides var. elymoides

Scanned 28 October 2015.

Coll. No. 1154, 22 Jun 2015, characters observed: Perennial tufted grass to 30 cm.; Leaves, hairy throughout, sheath, 8-9 cm., hairy abaxial, ligule, membraneous, <1 mm., auricle,0, blade, 11 cm., rolled, hairy both sides; Inflorescence, 10-11 cm., internodes 5 mm., disarticulating at axis; Spikelets, 2-ranked, sessile, 2 per node, not embedded in pits; Glumes, 50-55 mm., spreading, some with 2-3 awn-like divisions; Lemma, awns ±=glume awns.

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Two spikelets of Coll. No. 1154, Elymus elymoides var. elymoides

Scanned 28 October 2015.

The things to see here are that the spikelets are two-ranked, two per node, and that the glumes are awn-like and split into 2-3 parts.

Coll. No. 1154, 22 Jun 2015, characters observed: Perennial tufted grass to 30 cm.; Leaves, hairy throughout, sheath, 8-9 cm., hairy abaxial, ligule, membraneous, <1 mm., auricle,0, blade, 11 cm., rolled, hairy both sides; Inflorescence, 10-11 cm., internodes 5 mm., disarticulating at axis; Spikelets, 2-ranked, sessile, 2 per node, not embedded in pits; Glumes, 50-55 mm., spreading, some with 2-3 awn-like divisions; Lemma, awns ±=glume awns.

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Inflorescence of Coll. No. 1154, Elymus elymoides var. elymoides

Scanned 28 October 2015.

Coll. No. 1154, 22 Jun 2015, characters observed: Perennial tufted grass to 30 cm.; Leaves, hairy throughout, sheath, 8-9 cm., hairy abaxial, ligule, membraneous, <1 mm., auricle,0, blade, 11 cm., rolled, hairy both sides; Inflorescence, 10-11 cm., internodes 5 mm., disarticulating at axis; Spikelets, 2-ranked, sessile, 2 per node, not embedded in pits; Glumes, 50-55 mm., spreading, some with 2-3 awn-like divisions; Lemma, awns ±=glume awns.

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Elymus multisetus

Coll. No. 423

Scanned 7 June 2012.

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Elymus trachycaulis

Inflorescence of Coll. No. 1528, Elymus trachycaulis

Scanned 16 January 2017.

North Table Mountain, Jefferson County, Colorado. Lower south slopes of North Table Mountain, above Peery Parkway, 250 m. south of the USBR monument “North Table,”1.25 km. north of the GNIS location of Golden. 39.7669°N, 105.22°W. WGS 1984 Elev. 1835 m. Small wetland where the North Table Mountain Trail crosses a watercourse below a near-perennial spring that is higher on the south slope of the mesa.

Coll. No. 1528, 5 August 2016, characters observed: Perennial grass, to 1 m., generally glabrous except as noted; Leaves, sheath, open, ligule, membraneous, auricles, small, 1 mm., blade, 25 mm. Inflorescence, bi-lateral spike; Spikelets, mostly 1 per node, about 1/3 have 2 per node, 21 mm. × 3.5 mm. wide, compression, lateral; Disarticulation, between the florets; Glumes, #2, ±equal, 11 mm. + awns 2 mm., not quite straight, thick, tough, not keeled, veins, 5, prominent, margins, widest at middle, Florets, #8, Lemma, 9 mm. + awn 3 mm, longitudinally symetric; Palea, 9 mm., tip, bifid, veins, ciliate; Anthers, 3 mm.

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Elymus trachycaulus

Inflorescence of Coll. No. 1499, Elymus trachycaulus

Scanned 6 January 2017,.

Coll. No 1499, 13 Jul 2016, characters observed: Perennial grass, to 80 cm., tufted, not strongly rhizomatous; Leaves, sheath, open, ligule, membraneous, 0.5 mm., auricles, 1 mm., thin, blade, 12-15 cm., flat to involute; Inflorescence, 2-sided spike Rachis, internodes, 6 mm., scabrous on margins; Spikelets, 1 per node, 17 mm. × 3.5 mm. wide, laterally compressed, appear to be positioned edge-wise to rachis, but this may be a feature of pressing/drying; Florets, 7+ per spikelet; Glumes, #2, ±equal, 8 mm. × 1.2 mm. wide, rounded, veins, #5; Lemma, 9 mm., rounded, veins, #7, glabrous; Palea, ±=lemma; Anthers, 4 mm.

Ackerfield (2015) and Baldwin (2012) lead equivocally to E. trachycaulus, whereas Shaw (2008) and Weber & Wittmann (2012) are more suggestive of E. lanceolatus.

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Coll. No. 1499, Elymus trachycaulus

Photographed 6 January 2017,.

Coll. No 1499, 13 Jul 2016, characters observed: Perennial grass, to 80 cm., tufted, not strongly rhizomatous; Leaves, sheath, open, ligule, membraneous, 0.5 mm., auricles, 1 mm., thin, blade, 12-15 cm., flat to involute; Inflorescence, 2-sided spike Rachis, internodes, 6 mm., scabrous on margins; Spikelets, 1 per node, 17 mm. × 3.5 mm. wide, laterally compressed, appear to be positioned edge-wise to rachis, but this may be a feature of pressing/drying; Florets, 7+ per spikelet; Glumes, #2, ±equal, 8 mm. × 1.2 mm. wide, rounded, veins, #5; Lemma, 9 mm., rounded, veins, #7, glabrous; Palea, ±=lemma; Anthers, 4 mm.

Ackerfield (2015) and Baldwin (2012) lead equivocally to E. trachycaulus, whereas Shaw (2008) and Weber & Wittmann (2012) are more suggestive of E. lanceolatus.

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Elymus virginicus

Coll. No. 1561, Elymus virginicus

Scanned 24 January 2017.

Golden, Jefferson County, Colorado. Parkway at 420 Arapahoe Street. 39.7613°N, 105.2286°W. WGS 1984 Elev. 1755 m. Adventive grass in garden; perhaps introduced with seed of Sorghastrum nutans.

Coll. No. 1561, 4 Sep 2016, characters observed: Annual or perennial unknown (s/b perennial); Rhizomes unknown (s/b absent); Culm, erect, dark purple below; Inflorescence, terminal, spike, bilateral, exserted above leafy portion of plant; Disarticulation unknown (s/b rachis not disarticulating, in Elymus the rachis generally remains articulate); Spikelets, in pairs at each node; Glumes, #2, held away from florets, body 10 mm. + awn 4-5 mm. = 14-15 mm., veins 5 (2 ±obscure) at midlength, awn single (not split); Florets, #4-5, fertile; Lemma, lowest (adjacent to glume), body 7 mm. + awn 7 mm. = 14 mm., body, veins, 5 (2 ±obscure), awn straight;

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Erioneuron pulchellum (Kunth) Tateoka

Fluff Grass (Erioneuron pulchellum) in Furnace Creek wash.

Photograph taken 11-May-07.

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Fluff Grass (Erioneuron pulchellum) in Furnace Creek wash.

Photograph taken 11-May-07.

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Festuca idahoensis

Coll. No. 822, Festuca idahoensis

Scanned 16 Jun 2013.

Coll. No. 822, 30 May 2012, characters observed while keying: Perennial, to 50 cm; Roots fibrous; Stem herbaceous; Internodes hollow; Leaf blade and sheath differentiated, soft; Sheath open; Ligule membraneous, 0.5 mm.; Blade rolled inward; Inflorescence 1-2, 8-9 cm., > leaves, branching evident, panicle, spikelets many; Spikelets similar, 1/node, 1° and 2° branches, many flowered, 10 mm.; Florets, 4-6 per spikelet, bisexual (1-2 staminate, 3-4 staminate and pistillate, 5-6 staminate and ?pistillate); Glumes lower 4.5 mm, upper 3.0 mm, lower < lowest floret, veins 3-9, awns 0; Axis sparsely hairy, not extended beyond upper floret; Lemma 5 mm., rolled, veins 5, outer faint, tip entire, awns 1, 2.0-2.5 mm, straight, attached at tip; Palea < lemma, keel glabrous, margin glabrous, Anthers 3, 2 mm.; Ovary glabrous.

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Festuca perennis

Coll. No. 808, Festuca perennis

Scanned 29 May 2013.

Coll. No. 808, 8 May 2012, characters observed while keying: Annual, to 75-90 cm; Roots fibrous; Stem herbaceous; Nodes dark and constricted; Internodes hollow; Leaf blades and sheath differentiated; Blade soft; Sheath open; Ligule membraneous, short (1 mm); Inflorescence 3-many, spike, > leaves, spikelets many, alternate; Compresson lateral (unremarkable); Disarticulation unknown; Spikelets similar, 1/node, sessile, 2-many flowered, length 15-20 mm; Florets, 12-13 per spikelet, lowermost pistillate; Glumes, upper, 10 mm, 5 veins prominent abaxially, lower absent except in terminal spikelets; Lemma veins 5, awns 1, to 10 mm.

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Coll. No. 808, Festuca perennis

Scanned 29 May 2013.

Coll. No. 808, 8 May 2012, characters observed while keying: Annual, to 75-90 cm; Roots fibrous; Stem herbaceous; Nodes dark and constricted; Internodes hollow; Leaf blades and sheath differentiated; Blade soft; Sheath open; Ligule membraneous, short (1 mm); Inflorescence 3-many, spike, > leaves, spikelets many, alternate; Compresson lateral (unremarkable); Disarticulation unknown; Spikelets similar, 1/node, sessile, 2-many flowered, length 15-20 mm; Florets, 12-13 per spikelet, lowermost pistillate; Glumes, upper, 10 mm, 5 veins prominent abaxially, lower absent except in terminal spikelets; Lemma veins 5, awns 1, to 10 mm.

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Glyceria elata

Coll. No. 869, Glyceria elata

Scanned 7 Mar 2013.

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Coll. No. 869, Glyceria elata

Scanned 7 Mar 2013.

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Glyceria striata

Coll. No. 1446, Glyceria striata

Photographed 15 December 2016.

Coll. No. 1446, 22 Jun 2016, characters observed: Perennial grass, to 1 m.; Leaf, sheath closed, ligule membraneous, blade, 3 mm. wide; Inflorescence, loose panicle; Spikelets, one per node on short pedicels, laterally compressed, 2+ fertile florets, all similar; Glumes, #2, lower < upper, lower 1-nerved; Disarticulation, above the glumes; Lemma, 7-nerved, well-developed, evenly spaced, apices prow-shaped, awns, 0.

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Hilaria rigida

Coll. No. 337, Hilaria rigida

Scanned 10 June 2012.

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Hordeum brachyantherum

Coll. No. 807, Hordeum brachyantherum var. brachyantherum

Scanned 22 May 2012.

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Coll. No. 807, Hordeum brachyantherum var. brachyantherum

Scanned 22 May 2012.

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Coll. No. 1214, Hordeum brachyantherum in open water of spring.

Photographed 17 July 2015.

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Hordeum jubatum

Coll. No. 664, Hordeum jubatum

Scanned 7 June 2011.

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Coll. No. 664, Hordeum jubatum

Scanned 7 June 2011.

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Hordeum pusillum

Coll. No. 1453, Hordeum pusillum

Scanned 17 December 2016.

Coll. No. 1453, 22 June 2016, characters observed: Annual, to 15 cm.; Leaves, sheath, open, 31 mm., ligule, membraneous, 0.7 mm., auricles, ±0; blade, 51 mm.; Inflorescence, dense 2-sided spike, 46 mm. × 5 mm. wide, base inserted in upper leaf sheath; Spikelets, 3 per node, central spikelet, sessile, fertile, 1 floret, lateral spikelets, pedicelled, sterile; Glumes, #2, body 5 mm. + awn 7 mm. = 12 mm., straight. Native. Type collected by Nuttall in 1810 “on the arid and saline plains of the Missouri” (Nuttall, 1818, p. 87-88).

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Coll. No. 1500.1, Hordeum pusillum

Scanned 6 January 2017.

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Koeleria macrantha

Coll. No. 1117, Koeleria macrantha

Scanned 21 September 2015.

Coll. No. 1117, 28 May 2015, characters observed: Perennial grass, to 40 cm., not rhizomatous, lacking bulbous base; Leaves, sheath open, ligule membraneous, 1 mm., auricles 0, blade 38 mm. × 2.5 mm., tip, prow-shaped; Inflorescence, 70-80 mm., panicle, narrow, contracted; Spikelets, not enclosed in burs, not in pairs, pedicellate, 5 mm., green with purple tinge, moderately laterally compressed; Pedicel, ascending hairs; Glumes, ±similar, slightly keeled, ±hairy on keel, lower, 3 mm., <1st lemma, upper, 5 mm.; Florets, mostly 2 per spikelet; Rachilla, extends beyond upper floret, glabrous; Callus, few hairs, not cobwebby; Lemma, 4 mm., hairs at base, barely keeled, keel with few short hairs, veins, 3 conspicuous, tips scarious; Palea, <lemma, transparent, veins, 2, hairy.

Distinguished from P. secunda on the strength of: lateral compression (Harrington, 1954), keels on glumes and lemmas (Weber & Wittmann, 2012, and Ackerfield, 2015), lack of cobwebby hairs at base of lemma (Shaw, 2008), and lemma hairy on keel and flowers unisexual (Baldwin, 2012).

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Coll. No. 1131, Koeleria macrantha

Scanned 7 October 2015.

Coll. No. 1131, 9 June 2015, characters observed: Perennial grass, to 45 cm., non-rhizomatous; Leaves, sheath, open, ligule, 1.5 mm., membraneous, auricles, 0, blade, tip prow-shaped; Inflorescence, panicle, shiny in anthesis, short branches, branches hairy; Florets, 3, #1 and #2 pistillate, #3 staminate, open, i.e., palea separated from lemma; Disarticulation, between florets; Rachilla hairy, extends nearly 1 mm. above upper floret, extension undecorated; Lemma, 4.5 mm., veins 5, short hairy throughout, awn, 0.5 mm., short, soft; Palea, =lemma, transparent; Stamens, 3, 1.8 mm.

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Inflorescence of Coll. No. 1419, Koeleria macrantha

Scanned 6 December 2016.

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Coll. No. 1131, Koeleria macrantha

Photographed 9 June 2015.

Coll. No. 1131, 9 June 2015, characters observed: Perennial grass, to 45 cm., non-rhizomatous; Leaves, sheath, open, ligule, 1.5 mm., membraneous, auricles, 0, blade, tip prow-shaped; Inflorescence, panicle, shiny in anthesis, short branches, branches hairy; Florets, 3, #1 and #2 pistillate, #3 staminate, open, i.e., palea separated from lemma; Disarticulation, between florets; Rachilla hairy, extends nearly 1 mm. above upper floret, extension undecorated; Lemma, 4.5 mm., veins 5, short hairy throughout, awn, 0.5 mm., short, soft; Palea, =lemma, transparent; Stamens, 3, 1.8 mm.

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Leymus triticoides

Coll. No. 1487, Leymus triticoides

Scanned 2 January 2017.

Coll. No. 1487, 6 Jul 2016, characters observed: Perennial, to 90 cm., long scaly rhizomes not found, culms, 1.5 mm. dia., generally glabrous, except lemma minutely scabrous; Leaves, sheath, open, glabrous, ligule, membraneous, 0.8 mm., auricles, very small, blade, involute; Inflorescence, spike-like, 2-sided, 115 mm. × 8 mm. wide; Spikelets, in pairs, sessile; Glumes, #2, awl-like, lower, 8 mm., upper, 10 mm.; Disarticulation, above the glumes, between florets unclear; Florets, #5, + 1 rudimentary at top of rachilla; Lemma (largest), body 14 mm. + awn 2 mm., reduced above, veins 5, minutely scabrous; Palea, 11 mm., enclosing embryo, tip bifid.

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Melica stricta

Coll. No. 1187, Melica stricta

Photographed 26 June 2015.

Coll. No. 1187, 26 June 2015, characters observed: Perennial caespitose grass, to 35 cm., basal or subterranean nodes not swollen; Leaf, sheath and blade differentiated, tips flat; Inflorescence, panicle, 1° and 2° branches, appressed, pedicels sharply bent below spikelets, Spikelets, many, 1 per node, all similar, laterally compressed, Glumes, very short hairy, awns 0, lower, 10 mm., veins 3, <lowest floret, broadly transparent, upper, 11 mm., veins 5; Axis, scabrous or shory hairy, segments not thickened; Callus, glabrous; Florets, (3)4(5) per spikelet, lowest sterile, next 2 bisexual, uppermost vestigal; Lemma, 11 mm., very short hairy, veins 5 faint, awns 0; Palea, 6 mm., keels ciliate, margins.

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Habitat of Coll. No. 1187, Melica stricta

Photographed 26 June 2015.

Coll. No. 1187, 26 June 2015, characters observed: Perennial caespitose grass, to 35 cm., basal or subterranean nodes not swollen; Leaf, sheath and blade differentiated, tips flat; Inflorescence, panicle, 1° and 2° branches, appressed, pedicels sharply bent below spikelets, Spikelets, many, 1 per node, all similar, laterally compressed, Glumes, very short hairy, awns 0, lower, 10 mm., veins 3, <lowest floret, broadly transparent, upper, 11 mm., veins 5; Axis, scabrous or shory hairy, segments not thickened; Callus, glabrous; Florets, (3)4(5) per spikelet, lowest sterile, next 2 bisexual, uppermost vestigal; Lemma, 11 mm., very short hairy, veins 5 faint, awns 0; Palea, 6 mm., keels ciliate, margins.

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Coll. No. 1187, Melica stricta

Scanned 10 November 2015.

Coll. No. 1187, 26 June 2015, characters observed: Perennial caespitose grass, to 35 cm., basal or subterranean nodes not swollen; Leaf, sheath and blade differentiated, tips flat; Inflorescence, panicle, 1° and 2° branches, appressed, pedicels sharply bent below spikelets, Spikelets, many, 1 per node, all similar, laterally compressed, Glumes, very short hairy, awns 0, lower, 10 mm., veins 3, <lowest floret, broadly transparent, upper, 11 mm., veins 5; Axis, scabrous or shory hairy, segments not thickened; Callus, glabrous; Florets, (3)4(5) per spikelet, lowest sterile, next 2 bisexual, uppermost vestigal; Lemma, 11 mm., very short hairy, veins 5 faint, awns 0; Palea, 6 mm., keels ciliate, margins.

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Muhlenbergia asperifolia

Dried collection of Alkali Muhley, my collection no. 490.

Scanned 3 March 2011. Background grid is 10 x 10 to the inch.

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Muhlenbergia montana

Coll. No. 1282, Muhlenbergia montana

Photographed 16 January 2016.

Coll. No. 1282, 28 Aug 2015, characters observed: Perennial grass, to 50 cm., caespitose; Leaves, sheath, open, ligule, membraneous, 4.5 mm., auricles, 0, blade, 110 mm. × 1 mm. wide; Inflorescence, rather sparse contracted panicle, 120 mm.; Florets per spikelet, #1; Glumes, #2, papery, toothed, lower, 1.5 mm., upper, 2 mm., teeth 3; Lemma, 3 mm. + awn 13 mm., flexuous, tuft of hairs at base; Palea, 2.8 mm.

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Inflorescence of Coll. No. 1282, Muhlenbergia montana

Scanned 16 January 2016.

Coll. No. 1282, 28 Aug 2015, characters observed: Perennial grass, to 50 cm., caespitose; Leaves, sheath, open, ligule, membraneous, 4.5 mm., auricles, 0, blade, 110 mm. × 1 mm. wide; Inflorescence, rather sparse contracted panicle, 120 mm.; Florets per spikelet, #1; Glumes, #2, papery, toothed, lower, 1.5 mm., upper, 2 mm., teeth 3; Lemma, 3 mm. + awn 13 mm., flexuous, tuft of hairs at base; Palea, 2.8 mm.

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Muhlenbergia richardsonis

Coll. No. 673, Muhlenbergia richardsonis

Scanned 6 Nov 2011.

Coll. No. 673, 6 Nov 2011, Characters observed while keying: Perennial, low, 12-15 cm, terrestrial; Rhizomes creeping, subterranean internodes not swollen; Leaf blade and sheath clearly differentiated, sheath open, margin membranaceous; Ligule membranaceous, 1.5 mm; Infloresence mature clearly > leaves, 5 mm wide, much branched, to at least 2°; Spikelet similar throughout plant, many, 2.5 mm, one-flowered, cylindric, axis not extended beside floret, not subtended by bristles or hairs; Glumes 2, unequal, < 2 mm, not swollen at base, not awned or long-pointed, glabrous, not ciliate-keeled, < lemma; Lemma vein 3, glabrous, awn 0; Palea 2-veined; Stamens 3.

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Coll. No. 673, Muhlenbergia richardsonis

Scanned 6 Nov 2011.

Coll. No. 673, 6 Nov 2011, Characters observed while keying: Perennial, low, 12-15 cm, terrestrial; Rhizomes creeping, subterranean internodes not swollen; Leaf blade and sheath clearly differentiated, sheath open, margin membranaceous; Ligule membranaceous, 1.5 mm; Infloresence mature clearly > leaves, 5 mm wide, much branched, to at least 2°; Spikelet similar throughout plant, many, 2.5 mm, one-flowered, cylindric, axis not extended beside floret, not subtended by bristles or hairs; Glumes 2, unequal, < 2 mm, not swollen at base, not awned or long-pointed, glabrous, not ciliate-keeled, < lemma; Lemma vein 3, glabrous, awn 0; Palea 2-veined; Stamens 3.

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Coll. No. 890, Muhlenbergia richardsonis

Scanned 19 August 2013.

Coll. No. 891, 23 August 2013, characters observed while keying: Perennial, to 15 cm, terrestrial, spreading by scaly rhizomes; Stem, nodes green; Leaf, sheath and blade differentiated, ligule membraneous, 1 mm; Inflorescence, exceeding upper leaves, 3 mm wide, axis partially hidden by branches and spikelets, not extended above spikelets; Spikelets, many in a well-developed inflorescence, attached to 1° and 2° branches, not subtended by bristles or long silky hairs, all spikelets similar, 1- flowered, laterally compressed, breaking apart above glumes; Glumes, 2, 1 mm, ±½lemma, equal, not: keeled, ciliate keeled, winged, or tapered to points; Lemma, glabrous, veins 1 obvious + 2 faint, not hardened, awns 0; Palea, well-developed.

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Muhlenbergia wrightii

Coll. No. 1553, Muhlenbergia wrightii

Photographed 1 Sep 2016.

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Ligule of Coll. No. 1276, Muhlenbergia wrightii

Scanned 12 January 2016.

Coll. No. 1276, 30 Jul 2015, characters observed: Perennial grass, to 60 cm., caespitose; Culms, erect, not rooting at nodes, short hairy; Leaves, sheath, open, 12 cm., ligule, membraneous, 1 mm., auricles 0, blade, 12 cm. × 1.5 mm., folded; Inflorescence, narrow (4 mm.) spike-like panicle; Spikelets, neither enclosed in burs nor in pairs; Florets, 1 per spikelet, reduced florets absent; Glumes, ±equal, 1.5 mm. + awn 0.5 mm.; Disarticulation, above the glumes; Lemma, 2 mm. × 0.5 mm. wide + awn 0.5 mm. (usually described as “mucronate” rather than awned); Palea, ?.

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Inflorescence of Coll. No. 1276, Muhlenbergia wrightii

Scanned 12 January 2016.

Coll. No. 1276, 30 Jul 2015, characters observed: Perennial grass, to 60 cm., caespitose; Culms, erect, not rooting at nodes, short hairy; Leaves, sheath, open, 12 cm., ligule, membraneous, 1 mm., auricles 0, blade, 12 cm. × 1.5 mm., folded; Inflorescence, narrow (4 mm.) spike-like panicle; Spikelets, neither enclosed in burs nor in pairs; Florets, 1 per spikelet, reduced florets absent; Glumes, ±equal, 1.5 mm. + awn 0.5 mm.; Disarticulation, above the glumes; Lemma, 2 mm. × 0.5 mm. wide + awn 0.5 mm. (usually described as “mucronate” rather than awned); Palea, ?.

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        images/TAS012760Infl.jpg

Coll. No. 1276, Muhlenbergia wrightii

Photographed 12 January 2016.

Coll. No. 1276, 30 Jul 2015, characters observed: Perennial grass, to 60 cm., caespitose; Culms, erect, not rooting at nodes, short hairy; Leaves, sheath, open, 12 cm., ligule, membraneous, 1 mm., auricles 0, blade, 12 cm. × 1.5 mm., folded; Inflorescence, narrow (4 mm.) spike-like panicle; Spikelets, neither enclosed in burs nor in pairs; Florets, 1 per spikelet, reduced florets absent; Glumes, ±equal, 1.5 mm. + awn 0.5 mm.; Disarticulation, above the glumes; Lemma, 2 mm. × 0.5 mm. wide + awn 0.5 mm. (usually described as “mucronate” rather than awned); Palea, ?.

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Munroa squarrosa

Location where Munroa squarrosa was found

Photographed 10 February 2017.

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Munroa squarrosa “False Buffalo Grass”

Photographed 10 February 2017.

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Coll. No. 1551, Munroa squarrosa

Scanned 23 January 2017.

North Table Mountain Park, Jefferson County, Colorado. Top of North Table Mountain, near southern edge, 330 m. east of the USBR monument designated “North Table,” 1.64 km. north northeast of the GNIS location of Golden. 39.7696°N, 105.2154°W. WGS 1984 Elev. 1953 m.

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Location where Munroa squarrosa was found

Photographed 10 February 2017.

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Coll. No. 1551, Munroa squarrosa

Scanned 23 January 2017.

North Table Mountain Park, Jefferson County, Colorado. Top of North Table Mountain, near southern edge, 330 m. east of the USBR monument designated “North Table,” 1.64 km. north northeast of the GNIS location of Golden. 39.7696°N, 105.2154°W. WGS 1984 Elev. 1953 m.

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        images/TAS015510Oview.jpg

Nassella viridula

Inflorescence of Coll. No. 1146, Nassella viridula

Scanned 21 October 2015.

Coll. No. 1146, 15 Jun 2015, characters observed: Perennial grass, to 1 m., non-rhizomatous; Leaves, cauline, sheath, 17 mm., ligule, 3 mm., membraneous, collar with few hairs at sides, blade, to 30 cm., convolute; Inflorescence, panicle, to 20 cm.; Glumes, 2, 9 mm., ±equal, colorless, exc. 3 green veins, tip, short (2 mm.) hair-like awn; Disarticulation, above the glumes, Florets, 1 per spikelet; Lemma, 6 mm. × 1.2 mm. wide, green, hairy, indurate, enclosing grain, awns, 1, 20 mm., twisted, bent; Palea, 2 mm., glabrous.

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        images/TAS011460Spike.jpg

Inflorescence of Coll. No. 1146, Nassella viridula

Scanned 21 October 2015.

Coll. No. 1146, 15 Jun 2015, characters observed: Perennial grass, to 1 m., non-rhizomatous; Leaves, cauline, sheath, 17 mm., ligule, 3 mm., membraneous, collar with few hairs at sides, blade, to 30 cm., convolute; Inflorescence, panicle, to 20 cm.; Glumes, 2, 9 mm., ±equal, colorless, exc. 3 green veins, tip, short (2 mm.) hair-like awn; Disarticulation, above the glumes, Florets, 1 per spikelet; Lemma, 6 mm. × 1.2 mm. wide, green, hairy, indurate, enclosing grain, awns, 1, 20 mm., twisted, bent; Palea, 2 mm., glabrous.

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        images/TAS011460Infl.jpg

Paspalum dilatatum

Coll. No. 995, Paspalum dilatatum

Scanned 31 Dec 2014.

Coll. No. 995, 13 July 2013, characters observed while keying: Perennial, tall, but < 1.5 mm.; Stem herbaceous; Leaf sheath and blade differentiated; Ligule membraneous, to 4 mm.; Inflorescence in digitate branches, branches to 8 cm., subtended by silky hairs, 7-8 mm.; Spikelets, many per branch, single proximally, paired distally, stalked on an unbranched central axis, 3.2 mm × 2.2 mm. wide, compressed dorsally; Florets, bisexual; Glumes, > florets, enclosing them, membraneous, flexible, margin long silky hairy; Lemma veins converging; Palea not winged.

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        images/TAS009950Infl.jpg

Coll. No. 995, Paspalum dilatatum

Scanned 31 Dec 2014.

Coll. No. 995, 13 July 2013, characters observed while keying: Perennial, tall, but < 1.5 mm.; Stem herbaceous; Leaf sheath and blade differentiated; Ligule membraneous, to 4 mm.; Inflorescence in digitate branches, branches to 8 cm., subtended by silky hairs, 7-8 mm.; Spikelets, many per branch, single proximally, paired distally, stalked on an unbranched central axis, 3.2 mm × 2.2 mm. wide, compressed dorsally; Florets, bisexual; Glumes, > florets, enclosing them, membraneous, flexible, margin long silky hairy; Lemma veins converging; Palea not winged.

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        images/TAS00995Spikelets.jpg

Phleum pratense

Collection No. 501

Photograph taken August 2, 2007 beside Bohler Creek.

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        images/IMGP2716sm.jpg

Collection No. 501, Phleum pratense L. Timothy.

Scanned 13 March 2011. Background grid is 10 x 10 to the inch.

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        images/TAS005010oview.jpg

So, are there short awns? And what's with the truncate(?) glumes?

Scanned 22 Sep 2011, grid is 10 x 10 to the inch.

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        images/TAS005010infl.jpg

Coll. No. 1216, Phleum pratense

Photographed 17 July 2015.

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        images/IMGX1266sm.jpg

Poa annua

Coll. No. 920, Poa annua

Scanned 12 February 2013.

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        images/TAS009200Oview.jpg

Coll. No. 920, Poa annua

Photographed 12 February 2013.

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        images/IMG_1047sm.jpg

Poa bulbosa

Inflorescence of Coll. No. 1114, Poa bulbosa.

Scanned 15 September 2015.

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        images/TAS011140Infl.jpg

Florets of Coll. No. 1114, Poa bulbosa.

Scanned 15 September 2015.

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        images/TAS011140Florets.jpg

Coll. No. 1114, Poa bulbosa, bulbus bases of culms.

Scanned 15 September 2015.

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        images/TAS011140Bulb.jpg

Poa compressa

Coll. No. 861, Poa compressa

Scanned 24 February 2013.

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        images/TAS008610Inflsm.jpg

Habitat of Coll. No. 1231, Poa compressa

Photographed 20 July 2015.

It's in the small patch just above center, in front of the small shrub.

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        images/20150720_094726sm.jpg

Poa fendleriana fendleriana

Coll. No. 1126, Poa fendleriana ssp. fendleriana

Scanned 29 September 2015.

Coll. No. 1126, 1 June 2015, characters observed: Perennial grass, of shady dry places, to 40 cm., not rhizomatous; Leaves, sheath, open ½, ligule, membraneous, ±1 mm., auricles 0, blade, soft, short and rolled distally; Inflorescence, panicle, 3°-4° branches, somewhat contracted, i.e., not broad, branches sparsely scabrous; Pedicels, 1.5-2.5 mm., short ascending hairs; Spikelets, 1 per node; Compression lateral; Glumes, 2, lower, 3 mm., <lowest lemma, upper, 4 mm., Florets, 5-6, lowest 1-3 pistillate, upper undetermined but no evidence of stamens; Callus glabrous; Rachilla, extends beyond upper floret; Lemma, 4 mm., keeled, veins 5, tip obtuse, awns 0, wavy hairs proximal half of keels and margins; Palea, 2.3 mm., transparent, keels green and hairy.

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        images/TAS011260Spike.jpg

Coll. No. 1126, Poa fendleriana ssp. fendleriana

Scanned 29 September 2015.

Coll. No. 1126, 1 June 2015, characters observed: Perennial grass, of shady dry places, to 40 cm., not rhizomatous; Leaves, sheath, open ½, ligule, membraneous, ±1 mm., auricles 0, blade, soft, short and rolled distally; Inflorescence, panicle, 3°-4° branches, somewhat contracted, i.e., not broad, branches sparsely scabrous; Pedicels, 1.5-2.5 mm., short ascending hairs; Spikelets, 1 per node; Compression lateral; Glumes, 2, lower, 3 mm., <lowest lemma, upper, 4 mm., Florets, 5-6, lowest 1-3 pistillate, upper undetermined but no evidence of stamens; Callus glabrous; Rachilla, extends beyond upper floret; Lemma, 4 mm., keeled, veins 5, tip obtuse, awns 0, wavy hairs proximal half of keels and margins; Palea, 2.3 mm., transparent, keels green and hairy.

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        images/TAS011260Infl.jpg

Poa palustris

Spikelets of Coll. No. 1529, Poa palustris

Sure hope I got this one right; spent enough time working on it.

Photographed 17 January 2017.

North Table Mountain, Jefferson County, Colorado. Lower south slopes of North Table Mountain, above Peery Parkway, 250 m. south of the USBR monument “North Table,”1.25 km. north of the GNIS location of Golden. 39.767°N, 105.22°W. WGS 1984 Elev. 1833 m. Small wetland where the North Table Mountain Trail crosses a watercourse below a near-perennial spring that is higher on the south slope of the mesa.

Coll. No. 1529, 5 August 2016, characters observed: Perennial grass, to 1 m., growing in running water; rhizomes, unknown (none seen); Leaves, sheath open, ligule, membraneous, 4 mm., blade, flat, scabrous, tip, narrow, not broadly prow-shaped; Inflorescence, open panicle, 28 cm. × 20 cm. wide, lower branches 4-5 per node; Pedicels, 0.3-3.0 mm.; Spikelets, 1 per node, 4 mm. × 1 mm., compression lateral, glumes, lemma, and paleae very fragile; Glumes, #2, lower, 2.6 mm., veins 3, upper, 2.8 mm., veins 3 (5?); Disarticulation, above the glumes; Florets, 3 fertile, + uppermost rudimentary; Lemma, 2.6 mm., veins, at least 3, maybe 5, basal hairs sparse, but length 1/2 the lemma, keeled, hairy proximally, margin, hairy proximally, glabrous between the veins; Palea, 2.3 mm.

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        images/TAS015290Spklt.jpg

Coll. No. 1529, Poa palustris

Sure hope I got this one right; spent enough time working on it.

Photographed 17 January 2017.

North Table Mountain, Jefferson County, Colorado. Lower south slopes of North Table Mountain, above Peery Parkway, 250 m. south of the USBR monument “North Table,”1.25 km. north of the GNIS location of Golden. 39.767°N, 105.22°W. WGS 1984 Elev. 1833 m. Small wetland where the North Table Mountain Trail crosses a watercourse below a near-perennial spring that is higher on the south slope of the mesa.

Coll. No. 1529, 5 August 2016, characters observed: Perennial grass, to 1 m., growing in running water; rhizomes, unknown (none seen); Leaves, sheath open, ligule, membraneous, 4 mm., blade, flat, scabrous, tip, narrow, not broadly prow-shaped; Inflorescence, open panicle, 28 cm. × 20 cm. wide, lower branches 4-5 per node; Pedicels, 0.3-3.0 mm.; Spikelets, 1 per node, 4 mm. × 1 mm., compression lateral, glumes, lemma, and paleae very fragile; Glumes, #2, lower, 2.6 mm., veins 3, upper, 2.8 mm., veins 3 (5?); Disarticulation, above the glumes; Florets, 3 fertile, + uppermost rudimentary; Lemma, 2.6 mm., veins, at least 3, maybe 5, basal hairs sparse, but length 1/2 the lemma, keeled, hairy proximally, margin, hairy proximally, glabrous between the veins; Palea, 2.3 mm.

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        images/IMGQ3529sm.jpg

Poa pratensis

Roots of Coll. No. 1420, Poa pratensis

Scanned 7 December 2016.

Coll. No. 1420, 10 June 2016, characters observed: Perennial grass, rhizomatous (although of material collected for three vouchers, only one has rhizomes), not strongly flattened, to 75 cm.; Sheath, open about ½; Ligule, membraneous, 0.7 mm.; Auricles, 0; Inflorescence, much-branched open panicle, branches scabrous; Spikelets, one per node, 4 mm., awns 0; Florets, 3 per spikelet, reduced florets above fertile floret, #1 ♀, #2-3 ♂, Rachilla, extends 1 mm. above upper floret, not hairy; Glumes, #2, keeled, scabrous, lower, 2.0-2.3 mm., veins 1, upper, 2.5-3.0 mm., veins 3, prominent; Lemma, 3 mm., veins 5, keeled, tuft of hairs at base, >⅓ lemma; Palea, 2.3 mm., veins 2, green, otherwise translucent. Subspecies of P. pratensis are not recognized in Colorado (Weber&Wittmann 2012, Ackerman 2015).

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        images/TAS014200Roots.jpg

Inflorescence of Coll. No. 1420, Poa pratensis

Scanned 7 December 2016.

Coll. No. 1420, 10 June 2016, characters observed: Perennial grass, rhizomatous (although of material collected for three vouchers, only one has rhizomes), not strongly flattened, to 75 cm.; Sheath, open about ½; Ligule, membraneous, 0.7 mm.; Auricles, 0; Inflorescence, much-branched open panicle, branches scabrous; Spikelets, one per node, 4 mm., awns 0; Florets, 3 per spikelet, reduced florets above fertile floret, #1 ♀, #2-3 ♂, Rachilla, extends 1 mm. above upper floret, not hairy; Glumes, #2, keeled, scabrous, lower, 2.0-2.3 mm., veins 1, upper, 2.5-3.0 mm., veins 3, prominent; Lemma, 3 mm., veins 5, keeled, tuft of hairs at base, >⅓ lemma; Palea, 2.3 mm., veins 2, green, otherwise translucent. Subspecies of P. pratensis are not recognized in Colorado (Weber&Wittmann 2012, Ackerman 2015).

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        images/TAS014200Infl.jpg

Poa pratensis pratensis

Coll. No. 860, Poa pratensis ssp. pratensis

Scanned 23 February 2013.

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        images/TAS008600Inflsm.jpg

Coll. No. 470, Poa pratensis ssp. pratensus

The grid spacing is 1/4 inch.Coll. No. 470, 28 Nov 2011, characters observed while keying: Perennial to 60 cm; Nodes Leaf not prow-tipped; Sheath open; Auricles 0; Ligules membraneous; Infloresence terminal, panicle; Compression not dorsal, maybe lateral; Disarticulation above the glumes; Callus long cobwebby hairs (distinctive!); Spikelets similar throughout plant, attached to 2-3° branches, 8-12 per node; Glumes lower 2 mm (slightly) < upper 1.7 mm, glabrous, < florets; Lemma glabrous, veins 3; Awns 0; Florets 2+ per spikelet (eliminates Agrostis); Anthers 3, purple; Stigma white.

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        images/TAS004700oview.jpg

Coll. No. 470, Poa pratensis ssp. pratensus

The grid spacing is 1/4 inch.Coll. No. 470, 28 Nov 2011, characters observed while keying: Perennial to 60 cm; Nodes Leaf not prow-tipped; Sheath open; Auricles 0; Ligules membraneous; Infloresence terminal, panicle; Compression not dorsal, maybe lateral; Disarticulation above the glumes; Callus long cobwebby hairs (distinctive!); Spikelets similar throughout plant, attached to 2-3° branches, 8-12 per node; Glumes lower 2 mm (slightly) < upper 1.7 mm, glabrous, < florets; Lemma glabrous, veins 3; Awns 0; Florets 2+ per spikelet (eliminates Agrostis); Anthers 3, purple; Stigma white.

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        images/TAS004700infl.jpg

Coll. No. 470, Poa pratensis ssp. pratensis

Scanned 28 Nov 2011.

Coll. No. 470, 28 Nov 2011, characters observed while keying: Perennial to 60 cm; Nodes Leaf not prow-tipped; Sheath open; Auricles 0; Ligules membraneous; Infloresence terminal, panicle; Compression not dorsal, maybe lateral; Disarticulation above the glumes; Callus long cobwebby hairs (distinctive!); Spikelets similar throughout plant, attached to 2-3° branches, 8-12 per node; Glumes lower 2 mm (slightly) < upper 1.7 mm, glabrous, < florets; Lemma glabrous, veins 3; Awns 0; Florets 2+ per spikelet (eliminates Agrostis); Anthers 3, purple; Stigma white.

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        images/TAS004700Oview2.jpg

Coll. No. 470, Poa pratensis ssp. pratensis

Scanned 28 Nov 2011.

Coll. No. 470, 28 Nov 2011, characters observed while keying: Perennial to 60 cm; Nodes Leaf not prow-tipped; Sheath open; Auricles 0; Ligules membraneous; Infloresence terminal, panicle; Compression not dorsal, maybe lateral; Disarticulation above the glumes; Callus long cobwebby hairs (distinctive!); Spikelets similar throughout plant, attached to 2-3° branches, 8-12 per node; Glumes lower 2 mm (slightly) < upper 1.7 mm, glabrous, < florets; Lemma glabrous, veins 3; Awns 0; Florets 2+ per spikelet (eliminates Agrostis); Anthers 3, purple; Stigma white.

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        images/TAS004700Infl2.jpg

Coll. No. 1118, Poa pratensis ssp. pratensis

Scanned 21 September 2015.

Coll. No. 1118, 28 May 2015, characters observed: Perennial grass, to 60 cm.; Rhizomes, to 12 cm., 0.8 mm. dia.; Culm, not bulbous at base, not strongly flattened; Leaf, sheath, 130 mm., open at least ½; ligule, 1.8 mm., membraneous; auricles 0, blade, lower involute, upper flat, 75 mm. × 3 mm. wide, tip prow-shaped; Inflorescence, panicle, shape at maturity unknown, branches scabrous; Spikelets, 5 mm., singly pedicelled on 3°-5° branches; Compression lateral; Disarticulation above the glumes; Glumes, keeled, small line of stiff hairs distally, lower, 2.3 mm., <lowest lemma, veins 3, upper, 2.5 mm.; Florets, appear staminate, may be immature; Callus with some cobwebby hairs, but cobwebby hairs also elsewhere; Lemma, 3 mm., veins, 5, prominent, ±evenly spaced (leads to Melica, which this is not), keel and margins cobwebby proximally, margins scarious, tip broadly acute, awns 0, Palea, 2.5 mm., green, esp. on veins.

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        images/TAS011180Infl.jpg

Poa secunda juncifolia

Inflorescence of Coll. No. 1175, Poa secunda ssp. juncifolia

Scanned 5 November 2015.

Coll. No. 1175, 25 Jun 2015, characters observed: Perennial grass, to 75 cm., basal or subterranean nodes not enlarged, rhizomes 0; Leaves, sheath, open, ligule, membraneous, 3 mm., blade, tips, prow-shaped; Inflorescence, well-developed panicle, 1°-4° branching evident, exceeding upper leaves; Spikelets, many, all similar, 1 per node, not subtended by bristles or long-silky hairs, ovate in outline, bisexual; Compression, obvious, moderate lateral; Glumes, #2, awns 0, < lowest floret, lower, 2.4 mm., veins 1, upper, 2.8 mm., veins 3; Disarticulation, above the glumes, Florets, #3+, fertile, 2+; Callus, generally glabrous, but there is a small (0.3 mm.) tangle of hairs atop the callus or at the base of the lemma that stays with the callus or caryopsis when lemma is removed; Lemma, 3.5 mm., slightly keeled distally, veins indistinct, awn 0; Palea, 3.2 mm., veins hairy or scabrous; Anthers, 1.8 mm.

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        images/TAS011750Oview.jpg

Inflorescence of Coll. No. 1175, Poa secunda ssp. juncifolia

Scanned 5 November 2015.

Coll. No. 1175, 25 Jun 2015, characters observed: Perennial grass, to 75 cm., basal or subterranean nodes not enlarged, rhizomes 0; Leaves, sheath, open, ligule, membraneous, 3 mm., blade, tips, prow-shaped; Inflorescence, well-developed panicle, 1°-4° branching evident, exceeding upper leaves; Spikelets, many, all similar, 1 per node, not subtended by bristles or long-silky hairs, ovate in outline, bisexual; Compression, obvious, moderate lateral; Glumes, #2, awns 0, < lowest floret, lower, 2.4 mm., veins 1, upper, 2.8 mm., veins 3; Disarticulation, above the glumes, Florets, #3+, fertile, 2+; Callus, generally glabrous, but there is a small (0.3 mm.) tangle of hairs atop the callus or at the base of the lemma that stays with the callus or caryopsis when lemma is removed; Lemma, 3.5 mm., slightly keeled distally, veins indistinct, awn 0; Palea, 3.2 mm., veins hairy or scabrous; Anthers, 1.8 mm.

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        images/TAS011750Spklt.jpg

Spikelets of Coll. No. 1175, Poa secunda ssp. juncifolia

Scanned 5 November 2015.

Coll. No. 1175, 25 Jun 2015, characters observed: Perennial grass, to 75 cm., basal or subterranean nodes not enlarged, rhizomes 0; Leaves, sheath, open, ligule, membraneous, 3 mm., blade, tips, prow-shaped; Inflorescence, well-developed panicle, 1°-4° branching evident, exceeding upper leaves; Spikelets, many, all similar, 1 per node, not subtended by bristles or long-silky hairs, ovate in outline, bisexual; Compression, obvious, moderate lateral; Glumes, #2, awns 0, < lowest floret, lower, 2.4 mm., veins 1, upper, 2.8 mm., veins 3; Disarticulation, above the glumes, Florets, #3+, fertile, 2+; Callus, generally glabrous, but there is a small (0.3 mm.) tangle of hairs atop the callus or at the base of the lemma that stays with the callus or caryopsis when lemma is removed; Lemma, 3.5 mm., slightly keeled distally, veins indistinct, awn 0; Palea, 3.2 mm., veins hairy or scabrous; Anthers, 1.8 mm.

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        images/TAS011750Spklt3.jpg

Poa secunda secunda

Coll. No. 969, Poa secunda ssp. secunda

Scanned on 23 Feb 2014.

Coll. No. 969, 22 May 2013, characters observed: Perennial, tufted, to 30 cm.; Stem, base not bulbous; Sheath open; Leaf, blade and sheath differentiated; Inflorescence, >> leaves, branches ascending; Spikelets, many in well-developed inflorescence, all similar, on 2° branches, 1 per node, not subtended by bristles or long-silky hairs, narrowly ovate or lanceolate (not ovate), laterally compressed; Florets, 4+ per spikelet; Callus, glabrous; Glumes, short hairy, awns 0; Lemma, ±evenly short hairy, awns 0; Anther, 1.6 mm.

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        images/TAS009690Infl.jpg

Coll. No. 969, Poa secunda ssp. secunda

Scanned on 23 Feb 2014.

Coll. No. 969, 22 May 2013, characters observed: Perennial, tufted, to 30 cm.; Stem, base not bulbous; Sheath open; Leaf, blade and sheath differentiated; Inflorescence, >> leaves, branches ascending; Spikelets, many in well-developed inflorescence, all similar, on 2° branches, 1 per node, not subtended by bristles or long-silky hairs, narrowly ovate or lanceolate (not ovate), laterally compressed; Florets, 4+ per spikelet; Callus, glabrous; Glumes, short hairy, awns 0; Lemma, ±evenly short hairy, awns 0; Anther, 1.6 mm.

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        images/TAS009690Oview.jpg

Poaceae

Coll. No. 1126, Grass

Photographed 1 June 2015.

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        images/IMGQ0674sm.jpg

Coll. No. 983

Photographed 19 Jun 2013.

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        images/IMG_1503sm.jpg

Poaceae Agrostis stolonifera

Coll. No. 514, Agrostis stolonifera

Scanned 17 March 2011. Background grid is 10 x 10 to the inch.

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        images/TAS005140oview.jpg

Polypogon monspeliensis

Coll. No. 1177, Polypogon monspeliensis

Scanned 5 November 2015.

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        images/TAS011770Oview.jpg

Coll. No. 983, Polypogon monspeliensis

Photographed 23 February 2015.

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        images/IMGQ0225sm.jpg

Coll. No. 1007, Polypogon monspeliensis

Photographed 16 February 2015.

Coll. No. 1007, 22 Jul 2013, characters observed while keying: Annual, or short-lived perennial, to 35 cm.; Nodes, green; Leaf, blade and sheath differentiated; Inflorescence, >> leaves, 3.5 cm., dense; Spikelets, many, similar, not subtended by bristles or hairs, cylindric, axis not extended beside or above floret, attached to 2°-3° branches, stalk 0.3 mm.; Florets, 1 per spikelet, bisexual; Glumes, 2, 1.5 mm., equal, not keeled or ciliate-keeled, short hairy, lobed, awns 1 per glume, 4.5 mm.; Lemmas, membranous, glabrous, short hair-like “awn”; Palea, membranous, glabrous; Stamens, 3.

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        images/IMG40883sm.jpg

Ligule of Coll. No. 1177, Polypogon monspeliensis

Scanned 5 November 2015.

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        images/TAS011770Ligule.jpg

Coll. No. 1007, Polypogon monspeliensis

Photographed 16 February 2015.

Coll. No. 1007, 22 Jul 2013, characters observed while keying: Annual, or short-lived perennial, to 35 cm.; Nodes, green; Leaf, blade and sheath differentiated; Inflorescence, >> leaves, 3.5 cm., dense; Spikelets, many, similar, not subtended by bristles or hairs, cylindric, axis not extended beside or above floret, attached to 2°-3° branches, stalk 0.3 mm.; Florets, 1 per spikelet, bisexual; Glumes, 2, 1.5 mm., equal, not keeled or ciliate-keeled, short hairy, lobed, awns 1 per glume, 4.5 mm.; Lemmas, membranous, glabrous, short hair-like “awn”; Palea, membranous, glabrous; Stamens, 3.

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        images/IMGQ0173sm.jpg

Puccinellia nuttalliana

Spikelets of Coll. No. 1174, Puccinellia nuttalliana

Scanned 4 November 2015.

Coll. No. 1174, 25 Jun 2015, characters observed: Perennial grass, to 60 cm., not rhizomatous; Leaves, sheath, open, ligule, membraneous, blade, involute, 2 mm. wide when flat; Inflorescence, well-developed panicle, 21 cm., many similar spikelets; Spikelets, 1 per node, attached to 1°-3° branches, 6 mm. × 1.3 mm. wide, Glumes, 2, lower < lowest floret, awns 0; Pedicel, uniformly scabrous; Florets, #3, androgynous; Lemmas, lowest, 2.7 mm., veins 5, tip obtuse, awns 0; Anther, 0.9 mm.

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        images/TAS011740Spklt.jpg

Inflorescence of Coll. No. 1174, Puccinellia nuttalliana

Scanned 4 November 2015.

Coll. No. 1174, 25 Jun 2015, characters observed: Perennial grass, to 60 cm., not rhizomatous; Leaves, sheath, open, ligule, membraneous, blade, involute, 2 mm. wide when flat; Inflorescence, well-developed panicle, 21 cm., many similar spikelets; Spikelets, 1 per node, attached to 1°-3° branches, 6 mm. × 1.3 mm. wide, Glumes, 2, lower < lowest floret, awns 0; Pedicel, uniformly scabrous; Florets, #3, androgynous; Lemmas, lowest, 2.7 mm., veins 5, tip obtuse, awns 0; Anther, 0.9 mm.

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        images/TAS011740Infl.jpg

Schizachyrium scoparium

Coll. No. 1262, Schizachyrium scoparium

Scanned 30 December 2015.

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        images/TAS012620Spklt.jpg

Coll. No. 1262, Schizachyrium scoparium

Scanned 30 December 2015.

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        images/TAS012620Infl.jpg

Schizachyrium scoparium (Little Blue Stem) in the Mines Survey Field.

Photographed 9 October 2015.

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Secale cereale

Coll. No. 1110, Secale cereale

Scanned 2 September 2015.

What attracted me to make this scan was the arrangement of glumes and lemmas. In S. cereale, the glumes are reduced nearly to an awl shape and appear to overlap and cover the rachis. The larger ciliate objects are the lemmas.

Coll. No. 1110, 26 May 2015, characters observed: Annual, erect to 1 m.; Leaf, sheath open, ligule membraneous, auricle 1 mm.; Inflorescence, terminal spike, 10 cm.; Internode 2 mm.; Spikelets, 2-ranked, 1 per node, sessile, bases not embedded in rachis; Glumes, 2, awl-like, 8-9 mm., ±equal, keeled, purplish distally, appearing to hide the rachis but not the lemmas; Florets 2, arranged side-to-side; Lemma, 12 mm., keeled, keel ciliate, margins, one ciliate, the other less so, awned; Awns, 16 mm., short proximally, lengthening distally, straight to wavy, some slightly twisted.

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        images/TAS011100Infl.jpg

Coll. No. 1110, Secale cereale, auricles ±1 mm.

Scanned 2 September 2015.

Coll. No. 1110, 26 May 2015, characters observed: Annual, erect to 1 m.; Leaf, sheath open, ligule membraneous, auricle 1 mm.; Inflorescence, terminal spike, 10 cm.; Internode 2 mm.; Spikelets, 2-ranked, 1 per node, sessile, bases not embedded in rachis; Glumes, 2, awl-like, 8-9 mm., ±equal, keeled, purplish distally, appearing to hide the rachis but not the lemmas; Florets 2, arranged side-to-side; Lemma, 12 mm., keeled, keel ciliate, margins, one ciliate, the other less so, awned; Awns, 16 mm., short proximally, lengthening distally, straight to wavy, some slightly twisted.

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        images/TAS011100Aur.jpg

Sorghastrum nutans

Yellow Indian Grass (Sorghastrum nutans) at Red Rocks

Photographed 7 October 2015.

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Sorghastrum nutans “Yellow Indian Grass”

Photographed 3 Sep 2016.

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Habitat of Coll. No. 1249, Sorghastrum nutans

Photographed 26 July 2015.

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Inflorescence of Coll. No. 1249, Sorghastrum nutans

Photographed 26 July 2015.

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Dissected spikelets of Coll. No. 1249, Sorghastrum nutans

Scanned 27 July 2015.

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Inflorescence spike of Coll. No. 1249, Sorghastrum nutans

Scanned 23 December 2015.

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        images/TAS012490Spike.jpg

Yellow Indian Grass (Sorghastrum nutans) at Red Rocks

Photographed 7 October 2015.

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        images/IMGQ1714sm.jpg

Yellow Indian Grass (Sorghastrum nutans) at Red Rocks

Photographed 7 October 2015.

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        images/IMGQ1687sm.jpg

One branch of panicle, Coll. No. 1249, Sorghastrum nutans

Scanned 27 July 2015.

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        images/TAS012490Infl.jpg

Spikelets of Coll. No. 1249, Sorghastrum nutans

Scanned 23 December 2015.

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        images/TAS012490Spklt.jpg

Spartina pectinata

Coll. No. 1288, Spartina pectinata

Photographed 17 January 2016.

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Sporobolus airoides

Coll. No. 1058, Sporobolus airoides

Scanned 18 August 2014.

Discarded. Pretty much destroyed while looking at arrangement of panicle branches at base of inflorescence.

Coll. No. 1058, 18 Aug 2014: Annual/perennial unknown, probably perennial in 1st year; Culm, lacking short rhizome; Sheath, conspicuous tufts of hairs at proximal end, Ackerfield (2015) says &lqquo;… tufts of hair at the tips …&rdquo, sparsely hairy at summit (distal end); Leaf, elongate, erect, blade rolled in bud; Panicle, large, 17 cm., open, lower nodes few branches, not appearing whorled, branches spreading at maturity, branches 2-7 cm.; Pedicels 2.0-4.5 mm.; Spikelets, not crowded, 2.8 mm., Glumes 1.5 & 2.5 mm.

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        images/TAS010580Oview.jpg

Stipa comata comata

Coll No. 663, Stipa comata

Scanned 5 June 2011. Grid is 10x10 to the inch.

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        images/TAS006630Oview.jpg

Coll No. 663, Stipa comata

Scanned 5 June 2011. Grid is 10x10 to the inch.

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        images/TAS006630Det.jpg

Coll. No. 992, Stipa comata var. comata

Photographed 20 Jun 2013.

Long, long, straight awns catching the sun and waving in the breeze.

Coll. No. 992, 20 June 2013, characters observed while keying: Perennial, to 1 m.; Ligule, membraneous, 4 mm.; Spikelets, florets, 1; Glumes, 2, 28–30 mm., ±equal; veins 5, glabrous; Floret, callus 3 mm.; Lemma, 10 mm., hardened at maturity, margins overlapping and enclosing grain, Awn 1, 146 mm., wavy in age, proximally short (<1 mm.) straight hairy.

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  • Inyo Forest Road 01S91 “Old Stationhouse Road,” Mono County, California: 71000.
  • Field Notes: Coll. No. 992.

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Stipa hymenoides

Coll. No. 477, Stipa hymenoides

The grid spacing is 1/4 inch.

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        images/TAS004770oview.jpg

Coll. No. 477, Stipa hymenoides

The grid spacing is 1/4 inch.

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        images/TAS004770det.jpg

Collection #575

Scanned May 6, 2010, grid is 10x10 to the inch.

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        images/TAS005750Oview.jpg

Coll. No. 425, Stipa hymenoides

Scanned 8 June 2012.

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        images/TAS004250Oview.jpg

Stipa miliacea

Coll. No. 813, Stipa miliacea var. miliacea

Scanned 10 May 2012.

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        images/TAS008130infl.jpg

Stipa miliacea miliacea

Smilo Grass (Stipa miliacea) growing with Wild Oats and Mustard.

Photographed 15 May 2012.

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Coll. No. 813, Stipa miliacea var. miliacea

Photographed 10 May 2012.

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Stipa occidentalis occidentalis

Coll. No. 671, Stipa occidentalis var. occidentalis

Scanned 5 Nov 2011.

Coll. No. 671, 5 Nov 2011, Characters observed while keying: Lemma hairy; Palea << lemma; Awn all segments hairy, lowest hairs < hairs on upper lemma.

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        images/TAS006710Oview.jpg

Thinopyrum intermedium

Habitat of Coll. No. 1272, Thinopyrum intermedium

Photographed 30 July 2015.

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        images/IMGQ1430sm.jpg

Trisetum spicatum

Coll. No. 833, Trisetum spicatum

Scanned 16 February 2013.

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        images/TAS008330Oview.jpg

Coll. No. 833, Trisetum spicatum

Scanned 18 February 2013.

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        images/TAS008330Infl.jpg

Unknown

Little unknown grass.

Photographed 10 February 2017.

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Another little unknown grass.

Photographed 10 February 2017.

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        images/IMGQ3561sm.jpg

 


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Date and time this article was prepared: 3/21/2017 9:27:57 AM