Carex petasata

Dewey

Amer. J. Sci. Arts 29: 246, plate W, fig. 72. 1836.

IllustratedEndemic
Synonyms: Carex liddonii Boott
Treatment appears in FNA Volume 23. Treatment on page 359. Mentioned on page 333, 334, 343, 356, 357, 358.

Plants densely cespitose. Culms 30–85 cm. Leaves: sheaths adaxially white-hyaline, summits U-shaped, prolonged more than 2.8 mm; distal ligules 2–5 mm; blades (2–) 3–4 per fertile culm, 10–30 (–40) cm × 2–4 (–5) mm. Inflorescences open, stiffly erect, green, gold, or pale-brown, (2–) 2.5–4.5 (–6) cm × 9–16 mm; proximal internode 4.5–9 mm; 2d internode (2–) 5–9 (–11) mm; proximal bracts scalelike, awn shorter than inflorescences. Spikes (3–) 4–7, distant, distinct, fusiform, ovoid, or obovoid, 15–27 × 5.5–9 mm, base tapered to attenuate, apex acute or rounded. Pistillate scales whitish green or gold, with greenish to gold midstripe, lanceolate or ovate, 5.8–7.6 mm, ± equaling perigynia, concealing beaks, margin white, 0.2–0.7 mm wide, apex acute to acuminate. Staminate scales with white-hyaline margin (0.2–) 0.3–0.7 mm wide. Perigynia appressed to ascending, whitish green to brown, conspicuously 10–19-veined abaxially, conspicuously 4–10-veined adaxially, at least 3 adaxially veins longer than achene, lanceolate to ovate, planoconvex, 6–8 × 1.7–2.4 mm, 0.5–0.9 mm thick, margin flat, including wing (0.2–) 0.3–0.5 mm wide, ciliate-serrulate at least distally; beak green, redbrown, brown, or gold, white-hyaline at tip, cylindric, unwinged, ± entire to 1 mm or flat, ± ciliate-serrulate, abaxial suture with conspicuous white margin, distance from beak tip to achene (2.8–) 3.2–4.6 mm. Achenes elliptic to ovate-elliptic, 2.2–3 × (1.1–) 1.3–1.8 mm, 0.5–0.7 mm thick.


Phenology: Fruiting summer.
Habitat: Dry to wet meadows, grasslands, open woods
Elevation: 500 m to timberline

Distribution

V23 625-distribution-map.jpg

Alta., B.C., N.W.T., Sask., Yukon, Alaska, Ariz., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

See comment under 125. Carex xerantica.

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 petasata"
0.28 cm2.8 mm <br />0.0028 m <br /> (0.32 cm3.2 mm <br />0.0032 m <br />) +
elliptic;ovate-elliptic +
smaller +
0.5mm +  and 0.7mm +
bidentatate +
papillose +
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
shortened +
persistent +
tapered +  and attenuate +
not enlarged +
ciliate-serrulate +  and entire +
White-hyaline (?) +, Gold (?) +, Brown (?) +, Redbrown (?) +  and Green (?) +
cylindric +
0 cm0 mm <br />0 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
30 cm300 mm <br />0.3 m <br /> (40 cm400 mm <br />0.4 m <br />) +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
3 (?) +  and 4 (?) +
v--shaped +
2mm;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 +
30 cm300 mm <br />0.3 m <br /> (85 cm850 mm <br />0.85 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Alta. +, B.C. +, N.W.T. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
500 m to timberline +
open +, pistillate +  and staminate +
hypogynous +  and subtending +
biconvex +  and trigonous +
Dry to wet meadows, grasslands, open woods +
4.5 cm45 mm <br />0.045 m <br /> (6 cm60 mm <br />0.06 m <br />) +
pale-brown +, gold +  and green +
0.9 cm9 mm <br />0.009 m <br /> (1.1 cm11 mm <br />0.011 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
not prophyllate +, sessile +  and pistillate +
multi-ranked +, 2-ranked +, 3-ranked +  and alternate +
basal +  and cauline +
white +  and white-hyaline +
conspicuous +
0.3mm +  and 0.5mm +
greenish +  and gold +
with (1-)3-6(-30) bristles and/or scales +
4-10-veined +  and 10-19-veined +
whitish green +  and brown +
appressed +  and ascending +
Fruiting summer. +
2-3(-4)-carpellate +
3 (?) +  and 1 (?) +
sheathless +  and bristlelike +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
Amer. J. Sci. Arts +
adventitious +
staminate +  and pistillate +
gold +  and whitish green +
basal +  and proximal +
ovate;lanceolate +
0.58 cm5.8 mm <br />0.0058 m <br /> (0.76 cm7.6 mm <br />0.0076 m <br />) +
herbaceous +  and membranous +
not differentiated +
cylindric +
Illustrated +  and Endemic +
distinct +
1.5 cm15 mm <br />0.015 m <br /> (2.7 cm27 mm <br />0.027 m <br />) +
obovoid;ovoid;obovoid;ovoid;fusiform +
0.55 cm5.5 mm <br />0.0055 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 +
u--shaped +
Carex liddonii +
Carex petasata +
Carex sect. Ovales +
species +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
plant +  and cespitose +