Carex arapahoensis

Clokey

Rhodora 21: 83. 1919.

IllustratedEndemicConservation concern
Treatment appears in FNA Volume 23. Treatment on page 356. Mentioned on page 342, 352, 354.

Plants densely cespitose. Culms 20–30 cm. Leaves: sheaths white-hyaline, summits usually U-shaped; distal ligules 1–2 (–2.5) mm; blades 3 (–5) per fertile culm, 10–40 cm × 2.2–3.2 mm. Inflorescences dense or sometimes open proximally, brown or purplish, 1.2–2 (–2.5) cm × (8–) 12–18 mm; proximal internode 1.5–3.5 mm; 2d internode 0.5–2.5 mm; proximal bracts bristlelike, shorter than inflorescences. Spikes 4–5, densely aggregated, usually at least proximal 1 distinct, obovoid, 9–12 × (5.5–) 7–9 mm, base rounded or attenuate, apex rounded or acute. Pistillate scales red or purple-brown to dark-brown, sometimes gold above the middle, sometimes with paler midstripe, ovate to broadly ovate, 4.3–5.6 mm, shorter than or equaling perigynium beaks, equaling or narrower than perigynia, margin white-hyaline, green, or gold 0.15–0.3 mm wide, apex usually acute. Anthers long-persistent. Perigynia appressed to ascending, usually dark-brown, often green or gold distally and at margins, veinless or conspicuously 3–6-veined abaxially, inconspicuously veined adaxially, broadly obovate to broadly ovate, flat except over achene, 4–5.5 × 2–2.7 mm, 0.25–0.4 (–0.5) mm thick, margin flat, including wing 0.4–0.6 mm wide, ciliate-serrulate at least on distal body; beak purplish or brown to redbrown, white-hyaline at tip, cylindric, unwinged, entire for 0.5–1.3 mm from tip, abaxial suture with conspicuous white margin, distance from beak tip to achene (1.9–) 2.2–2.9 mm. Achenes obovate or ovate, 1.6–2.1 × 1–1.4 mm, 0.3–0.5 mm thick.


Phenology: Fruiting late summer.
Habitat: Dry mountainsides, high meadows
Elevation: 3400–4000 m

Discussion

Of conservation concern.

Selected References

None.

Lower Taxa

None.

"+timesaslongasinflorescences" is not declared as a valid unit of measurement for this property."not undefined" is not a number.

... more about "Carex arapahoensis"
0.19 cm1.9 mm <br />0.0019 m <br /> (0.22 cm2.2 mm <br />0.0022 m <br />) +
ovate;obovate +
smaller +
0.3mm +  and 0.5mm +
long-persistent +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Clokey +
shortened +
persistent +
attenuate +  and rounded +
not enlarged +
cylindric +
10 cm100 mm <br />0.1 m <br /> (40 cm400 mm <br />0.4 m <br />) +
v--shaped +
2.2mm;3.2mm +
glumaceous +  and foliaceous +
2-ranked +  and arranged +
ascending +  and appressed +
scale-like +  and leaflike +
parallel +  and divergent +
terete +, rolled +  and plicate +
round +  and trigonous +
20 cm200 mm <br />0.2 m <br /> (30 cm300 mm <br />0.3 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
Colo. +, Utah +  and Wyo. +
3400–4000 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry mountainsides, high meadows +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
purplish +  and brown +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
white +, gold +, green +  and white-hyaline +
conspicuous +
0.4mm +  and 0.6mm +
with (1-)3-6(-30) bristles and/or scales +
veined +, 3-6-veined +  and veinless +
gold +, green +  and dark-brown +
appressed +  and ascending +
0.25mm +  and 0.4mm +
Fruiting late summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
adventitious +
gold +, purple-brown +  and dark-brown +
basal +  and proximal +
ovate;broadly ovate +
0.43 cm4.3 mm <br />0.0043 m <br /> (0.56 cm5.6 mm <br />0.0056 m <br />) +
narrower +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +, Endemic +  and Conservation concern +
0.55 cm5.5 mm <br />0.0055 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
distinct +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
obovoid +
0.7 cm7 mm <br />0.007 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1 (?) +  and 3 (?) +
septate +, hollow +  and solid +
compressed +, terete +  and trigonous +
papillate +
deciduous +  and persistent +
2-3(-4)-fid +
u--shaped +
Carex arapahoensis +
Carex sect. Ovales +
species +
plant +  and cespitose +