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, plano-convex, 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, red-brown, 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.

... more about "Carex petasata"
Joy Mastrogiuseppe +, Paul E. Rothrock +, A. C. Dibble +  and A. A. Reznicek +
Alta. +, B.C. +, N.W.T. +, Sask. +, Yukon +, Alaska +, Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +, Wash. +  and Wyo. +
500 m to timberline +
Dry to wet meadows, grasslands, open woods +
Fruiting summer. +
Amer. J. Sci. Arts +
Illustrated +  and Endemic +
Carex liddonii +
Carex petasata +
Carex sect. Ovales +
species +