Eastern Mojave Vegetation Coll. No. 1913, Carex occidentalis  
 

 

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If you have a question or a comment about this photograph you may write to me at: tomas@schweich.com I sometimes post interesting questions in my FAQ, but I never disclose your full name or address. 		  Cyperaceae Carex occidentalis
Scanned 2 December 2018.

Coll. No. 1913, 31 May 2018, characters observed:

Perennial sedge,

Habit, densely caespitose;

Culms, to 60 cm., lightly scabrous below head;

Leaves, 2.2 mm. wide, green, Sheaths, white-hyaline, ventrally smooth;

Inflorescence, 22-26 mm. × 8-9 mm. wide, 8-9 spikes, closely clustered;

Spikes, identical (appearing), brown (but not reddish), 7-9 mm. × 5-6 mm. wide, gynecandrous(?);

There are no anthers. However, there are filaments. In the upper spikes, the flowers are mixed staminate and pistillate with neither appearing to be particularly superior to the other.

Proximal bract, short (7.5 mm.) and setaceous (bristle-like);

Pistillate scales, 3.5 mm., <perigynia, green center, brawn laterally, hyaline margin;

Perigynia, #10 per spike, 3 mm. × 1.4 mm. wide, some weakly winged, papillate, beak flattish, ± sloping to tip, serrulate, achene to beak tip, 1.3 mm.;

Achene, 1.7 mm. × 1.4 mm. wide, biconvex;

Stigma, #2.

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Date and time this page was prepared: 11/3/2024 5:39:11 PM