Carex occidentalis

L. H. Bailey

Mem. Torrey Bot. Club 1: 14. 1889.

IllustratedEndemic
Treatment appears in FNA Volume 23. Treatment on page 290. Mentioned on page 287, 291.

Plants without conspicuous rhizomes. Culms 25–90 cm, 1.6–2 mm wide basally, 0.6–0.7 mm wide distally. Leaves: sheaths tight, green, fronts hyaline; ligules less than 2 mm, as long as wide; widest leaf-blades 1.5–2.5 (–3) mm wide. Inflorescences with 4–10 spikes, 1.5–3.5 cm × 6–10 mm; proximal internodes as long as to slightly longer than proximal spikes, rarely 2 times as long; proximal bracts to 3 cm; spikes with 3–10 ascending to spreading perigynia. Pistillate scales brown with green, 3-veined center, ovate, 3.4–4 × 1.6–2 mm, body wider than and as long as perigynium, apex acuminate to short-awned, awn less than 1 mm. Anthers 2.5 mm. Perigynia brown, sometimes with green margins, faces obscurely veined, 2.5–4.5 × 1.5–1.9 mm, base of body somewhat spongy, margins serrulate distally; beak 0.6–1.3 mm, apical teeth 0.2–0.3 mm. Stigmas straight, 0.07 mm wide. Achenes elliptic-circular, 1.9–2 × 1.5–1.6 mm.


Phenology: Fruiting spring–early summer.
Habitat: Dry grasslands, forests
Elevation: 1200–3500 m

Distribution

V23 494-distribution-map.jpg

Ariz., Calif., Colo., Mont., Nev., N.Mex., N.Dak., S.Dak., Tex., Utah, Wyo.

Discussion

There are questionable records from central Mexico of Carex occidentalis, which is otherwise endemic to the flora area.

Selected References

None.

Lower Taxa

None.

"widest" is not a number.

... more about "Carex occidentalis"
0.19 cm1.9 mm <br />0.0019 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
biconvex +
smaller +
1.5mm;1.6mm +
2.5 cm25 mm <br />0.025 m <br /> (?) +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
Peter W. Ball +
L. H. Bailey +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
shortened +
white-hyaline +, hyaline +  and narrow +
red tinged +  and brown +
rounded +
bidentate +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.13 cm1.3 mm <br />0.0013 m <br />) +
v--shaped +
0mm;20mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
0.34 cm3.4 mm <br />0.0034 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.16 cm1.6 mm <br />0.0016 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
round +  and trigonous +
25 cm250 mm <br />0.25 m <br /> (90 cm900 mm <br />0.9 m <br />) +
0.6mm;0.7mm +
Ariz. +, Calif. +, Colo. +, Mont. +, Nev. +, N.Mex. +, N.Dak. +, S.Dak. +, Tex. +, Utah +  and Wyo. +
1200–3500 m +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.19 cm1.9 mm <br />0.0019 m <br />) +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry grasslands, forests +
, +  and racemose +
sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0 cm0 mm <br />0 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
with (1-)3-6(-30) bristles and/or scales +
stipitate +, not +  and veined +
ascending +  and spreading +
Fruiting spring–early summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0 cm0 mm <br />0 m <br /> (3 cm30 mm <br />0.03 m <br />) +
2 times as long +  and slightly longer +
Mem. Torrey Bot. Club +
adventitious +
brown with green +
basal +  and proximal +
2-keeled +
cylindric +
Illustrated +  and Endemic +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +
2-3(-4)-fid +
Carex occidentalis +
Carex sect. Phaestoglochin +
species +
rhizomatous +  and short-rhizomatous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +