Carex straminiformis

L. H. Bailey

Mem. Torrey Bot. Club 1: 24. 1889.

IllustratedEndemic
Treatment appears in FNA Volume 23. Mentioned on page 341, 375.

Plants densely cespitose. Culms 20–50 cm. Leaves: sheaths adaxially white-hyaline, often cross-corrugated, summits U-shaped or rounded, sometimes prolonged to 2.5 mm beyond collar; distal ligules 1–2.5 (–3.5) mm; blades 2–4 (–7) per fertile culm, 8–25 cm × (2.5–) 3–4 mm. Inflorescences dense, gold or brown, 1.3–3 cm × 12–20 mm; proximal internode 0.5–3.9 (–5) mm; 2d internode 1–3 (–4) mm; proximal bracts scalelike or bristlelike, shorter than inflorescences. Spikes 3–8, usually distinct, broadly ovoid, 9–12 × 6–9 mm, base rounded to attenuate, apex rounded. Pistillate scales white, gold, redbrown, or coppery, with pale to green midstripe, lanceolate to ovate, 3.2–4.8 mm, shorter and narrower than perigynia, margin white, 0–0.15 (–0.3) mm wide, apex acute to acuminate. Perigynia ascending to spreading, green, straw colored, or occasionally white, 10–20-veined abaxially, conspicuously 0–12-veined adaxially, thin, broadly ovate, flat except over achene, 4–5.8 × 1.8–3.4 mm, 0.3–0.5 (–0.6) mm thick, 1.7–2.3 times as long as wide, margin flat, including wing 0.4–1 mm wide, edge minutely crinkled and ciliate-serrulate at least distally; beak spreading, gold, redbrown to dark-brown, sometimes white-hyaline at tip, flat, ± ciliate-serrulate, sometimes cylindric, unwinged, ± entire for 0.5–0.7 mm, abaxial suture usually inconspicuous, distance from beak tip to achene 2.2–3 mm. Achenes elliptic to broadly obovate, (1.4–) 1.7–2.4 × 1–1.6 mm, 0.3–0.5 mm thick.


Phenology: Fruiting summer.
Habitat: Rocky, gravelly soils
Elevation: 1900–3800 m

Distribution

V23 671-distribution-map.jpg

Calif., Idaho, Mont., Nev., Oreg., Utah, Wash.

Discussion

Selected References

None.

Lower Taxa

None.

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

... more about "Carex straminiformis"
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
elliptic;broadly obovate +
smaller +
0.3mm +  and 0.5mm +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
L. H. Bailey +
shortened +
persistent +
rounded +  and attenuate +
not enlarged +
entire +  and ciliate-serrulate +
cylindric +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
8 cm80 mm <br />0.08 m <br /> (25 cm250 mm <br />0.25 m <br />) +
2 (?) +  and 4 (?) +
v--shaped +
3mm;4mm +
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 /> (50 cm500 mm <br />0.5 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Calif. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wash. +
ciliate-serrulate +
crinkled +
1900–3800 m +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Rocky, gravelly soils +
brown +  and gold +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
0.4mm +  and 1mm +
pale +  and green +
with (1-)3-6(-30) bristles and/or scales +
0-12-veined +  and 10-20-veined +
white +, straw colored +  and green +
ascending +  and spreading +
0.3mm +  and 0.5mm +
Fruiting summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.39 cm3.9 mm <br />0.0039 m <br />) +
Mem. Torrey Bot. Club +
adventitious +
coppery +, redbrown +, gold +  and white +
basal +  and proximal +
lanceolate;ovate +
0.32 cm3.2 mm <br />0.0032 m <br /> (0.48 cm4.8 mm <br />0.0048 m <br />) +
shorter and narrower +
herbaceous +  and membranous +
not differentiated +
cross-corrugated +
cylindric +
Illustrated +  and Endemic +
distinct +
0.9 cm9 mm <br />0.009 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
0.6 cm6 mm <br />0.006 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 +
prolonged +
rounded +  and u--shaped +
0 cm0 mm <br />0 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
Carex straminiformis +
Carex sect. Ovales +
species +
plant +  and cespitose +