Carex stevenii

(T. Holm) Kalela

Ann. Bot. Soc. Zool.-Bot. Fenn. “Vanamo” 19(3): 11. 1944.

Basionym: Carex alpina var. stevenii T. Holm Amer. J. Sci. 166: 27. 1903
Synonyms: Carex anagare var. stevenii (T. Holm) A. E. Porsild Carex media var. stevenii (T. Holm) Fernald Carex norvegica var. stevenii (T. Holm) Dorn Carex norvegica subsp. stevenii (T. Holm) D. F. Murray Carex vahlii var. stevenii (T. Holm) Fernald
Treatment appears in FNA Volume 23. Mentioned on page 406.

Plants loosely cespitose. Culms 15–60 cm, distally finely scabrous. Leaves 3–4 mm wide. Inflorescences: proximal bracts shorter than or exceeding inflorescences; spikes overlapping, distinct, contiguous, short-oblong or cylindric, 5–15 × 3–4.5 mm; lateral 2–3 spikes pistillate; proximal spikes separate, erect, short-pendunculate; distal lateral contiguous or separate, not forming dense terminal cluster, of similar length; terminal spike gynecandrous. Pistillate scales dark brown to black, margins hyaline, ovate, shorter than and as broad as perigynia, midvein same color as body, inconspicuous. Perigynia ascending, green becoming dark brown or purple-black, veinless, elliptic, 2–2.5 × 1.25–1.5 mm, frequently serrulate, apex abruptly or gradually beaked, smooth or distal margins sparsely papillose; beak 0.2–0.3 mm, shallowly bidentate, serrulate or smooth. Achenes nearly filling body of perigynia.

Phenology: Fruiting Jun–Aug.
Habitat: Open forests, moist meadows, stream banks, occasionally reaching lower alpine tundra (Colorado)
Elevation: 2400–3500 m


V23 729-distribution-map.jpg

Colo., Idaho, Mont., N.Mex., Utah, Wyo.


The illustration in K. K. Mackenzie (1940) as Carex vahlii is C. stevenii. Although morphologically close to C. norvegica and alternatively treated as a race, C. stevenii is ecologically distinct and geographically distant from C. norvegica.

Selected References


Lower Taxa

... more about "Carex stevenii"
David F. Murray +
(T. Holm) Kalela +
Carex alpina var. stevenii +
Colo. +, Idaho +, Mont. +, N.Mex. +, Utah +  and Wyo. +
2400–3500 m +
Open forests, moist meadows, stream banks, occasionally reaching lower alpine tundra (Colorado) +
Fruiting Jun–Aug. +
Ann. Bot. Soc. Zool.-Bot. Fenn. “Vanamo” +
Illustrated +  and Endemic +
Carex anagare var. stevenii +, Carex media var. stevenii +, Carex norvegica var. stevenii +, Carex norvegica subsp. stevenii +  and Carex vahlii var. stevenii +
Carex stevenii +
Carex sect. Racemosae +
species +