Eastern Mojave Vegetation Inflorescence of Coll. No. 2255, Carex occidentalis  
 

 

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  Cyperaceae Carex occidentalis
Scanned 5 July 2020.

Plants of Jefferson County Open Space
Jefferson County, Colorado
Cyperaceae

Carex occidentalis L. H. Bailey.  Western Sedge.

Windy Saddle Park, Jefferson County, Colorado. Steep, narrow section of unnamed gulch in southeast corner of park, beside flowing water of ephemeral stream, 3.0 km. southwest of the GNIS location of Golden. 39.7367N, 105.2329W. WGS 1984 Elev. 1966 m.

Collected by permit: Jefferson County Open Space, 2020, issued: Apr 13, 2020, to: Tom Schweich.

Tom Schweich 2255. 4-May-2020

Coll. No. 2255, 4 May 2020, characters observed: Perennial sedge, few thin dark rhizomes (?); Culms, to 32 cm., ridges slightly scabrous below head; Leaves, 2.7 mm. wide, green, sheaths, white hyaline, smooth; Inflorescence, 24 mm. × 6 mm. wide, #6± spikes, loosely clustered; Spikes, identical appearing, androgynous, clearly bisexual, 7 mm. × 2.5 mm. wide; Bracts, 5 mm, proximal, 13.5 mm., <inflorescence; Pistillate scales, 4.2 mm., ≥perigynia, green mid-vein, brown laterally, hyaline margin, one margin sometimes folded over perigynia, awn, 0; Perigynia, #6± per spike, 3 mm. × 1.5 mm. wide, wingless, veins, 0 or vey obscure, glabrous, beak, <1 mm., ± sloping to tip, achene to beak tip, 1.3 mm.; Achene, 1.7 mm. × 1 mm. wide, ?biconvex–immature, obovate; Stigma, #2; Anthers, #2, 3.4 mm.

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Date and time this page was prepared: 2/28/2021 9:36:28 AM