Eastern Mojave Vegetation Coll. No. 2700, Calamagrostis canadensis.  
 

 

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If you have a question or a comment about this photograph you may write to me at: tas4@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address. 		  Poaceae Calamagrostis canadensis
Photographed 9 February 2022.

Plants of Colorado
Poaceae

Calamagrostis canadensis (Michx.) P. Beauv.  Bluejoint.

North Fork West Tennessee Creek, Lake County, Colorado. About 150 m. northeast of Lily Lake, at the current end of Pike-San Isabel Forest Road 131, 2.6 road miles west of US Highway 24, 140 km. southwest of the GNIS location of Golden. 39.3522°N, 106.3674°W. WGS 1984 Elev. 3229 m. Grass beside a still pond connecting to the creek.

Collected by permit: Pike - San Isabel National Forest, 2021, issued: Mar 29, 2021, to: Tom Schweich.

Tom Schweich 2700. 17-Aug-2021

Coll. No. 2700, 17 August 2021, characters observed: Perennial grass, to 90 cm., rhizomes unknown; Leaves, sheath, 90 mm., open, ligule, membranous, 3-5 mm., collar, minutely hairy, blade, 150 mm. × 6.5 mm. wide, scabrous; Inflorescence, 1 per culm, >leaves, 135 mm. × 25 mm. wide; Spikelets, many, 3 mm. × 1 mm. wide, similar, borne singly; Compression, ±lateral; Disarticulation, above the glumes; Glumes, lower, 3.5 mm., veins, 1, scabrous, purple to brown, upper, 3.0 mm., >lowest floret, scabrous, veins, 3, rounded, purple to brown; Florets, 1 per spikelet; Callus, straight white hairs, 2.5 mm.; Lemma, 2.5-3.0 mm., body < glumes, tip, 2-forked, awns, 1, 2.5 mm., straight, attached middle, included; Palea, 2 mm., <lemma, membranous.

Compare this collection to my Coll. No. 2011 (KHD, OBI, UCR), which was collected in earlier in the season of 2018 about 700 m. southeast of this collection. It was determined C. stricta at the time, but is very similar to this one. Perhaps, it is also C. canadensis. Per SEINet, there are six collections of Calamagrostis within 15 km. of my two collections; four of C. canadensis and two of C. stricta.

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Date and time this page was prepared: 4/27/2024 3:36:52 PM