Carex atrosquama


Proc. Biol. Soc. Wash. 25: 51. 1912.

Synonyms: Carex apoda Clokey Carex atrata subsp. atrosquama (Mackenzie) Hultén Carex atrata var. atrosquama (Mackenzie) Cronquist
Treatment appears in FNA Volume 23. Treatment on page 405. Mentioned on page 403, 404.

Plants loosely cespitose. Culms 20–50 cm, distally scabrous. Leaves 3–5 mm wide. Inflorescences: proximal bracts shorter than or exceeding inflorescences; spikes contiguous or the proximal separate, overlapping, erect, distinct, short-pendunculate, short-oblong or elongate, 8–20 × 5–6 mm; lateral 2–3(–5) spikes pistillate, of similar length; terminal spike gynecandrous. Pistillate scales dark brown or black to margins, ovate or broadly lanceolate, shorter than and as broad as perigynia, midvein same color as body, inconspicuous, occasionally raised, prominent, short-mucronate. Perigynia ascending, pale green becoming golden brown, veinless, elliptic, 2.5–3.5 × 1.5–1.75 mm, apex gradually or abruptly beaked, distally papillose; beak 0.3–0.5 mm, entire or shallowly bidentate, smooth. Achenes nearly filling body of perigynia.

Phenology: Fruiting Jun–Aug.
Habitat: Subalpine and alpine meadows, river gravels, shorelines
Elevation: 300–3600 m


V23 726-distribution-map.jpg

Alta., B.C., N.W.T., Yukon, Alaska, Colo., Idaho, Mont., Oreg., Utah, Wash.


The absence of collections of Carex atrosquama in Wyoming is unexpected.

Selected References


Lower Taxa

... more about "Carex atrosquama"
David F. Murray +
Mackenzie +
Alta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Colo. +, Idaho +, Mont. +, Oreg. +, Utah +  and Wash. +
300–3600 m +
Subalpine and alpine meadows, river gravels, shorelines +
Fruiting Jun–Aug. +
Proc. Biol. Soc. Wash. +
Illustrated +  and Endemic +
Carex apoda +, Carex atrata subsp. atrosquama +  and Carex atrata var. atrosquama +
Carex atrosquama +
Carex sect. Racemosae +
species +