Carex scopulorum

T. Holm

Amer. J. Sci. 164: 422, figs. 1–6. 1902.

Treatment appears in FNA Volume 23. Treatment on page 399. Mentioned on page 381, 395, 397, 398, 400, 401.

Plants not cespitose. Culms acutely angled, 10–90 cm, glabrous. Leaves: basal sheaths red-brown; sheath apex U-shaped; blades hypostomic, glabrous, 3–6 mm wide. Inflorescences: proximal bract shorter than inflorescence, 0.5–3 mm wide. Spikes erect; proximal 2–4 spikes pistillate, 1–2.5 cm × 3–5 mm, base cuneate; terminal 1–2 spikes staminate. Pistillate scales purple-brown, equaling perigynia, apex obtuse or acute, awnless. Perigynia ascending, pale brown with red-brown spots on apical 1/2, veinless, somewhat flattened, loosely enclosing achenes, ellipsoid or obovoid, 2–4 × 1.2–2.3 mm, dull, apex obtuse or acute, papillose; beak red-brown, 0.2–0.3 mm. Achenes not constricted, dull.


V23 714-distribution-map.jpg

Alta., B.C., Yukon, Calif., Colo., Idaho, Mont., Oreg., Utah, Wash., Wyo.


Varieties 3 (3 in the flora).

Carex scopulorum is the common species of sect. Phacocystis in subalpine, seasonally wet meadows in the western mountains. It is replaced on the western slope of the Cascade range by C. spectabilis, a member of sect. Scitae. Where sympatric with C. aquatilis, C. scopulorum occurs in drier portions of the habitat.

Carex scopulorum is frequently confused with members of sect. Racemosae because of the similarity in habitat, size, inflorescence dimensions, and perigynium shape; it is distinguished by the two stigmas and flattened achenes. Carex scopulorum is probably most closely related to C. bigelowii, based on the similarity in vegetative morphology, hypostomic leaves, perigynia characteristics (absence of veins), and chromosome numbers.

Selected References



1 Proximal sheaths brown, glabrous; culms glabrous on angles; perigynia obovoid. Carex scopulorum var. scopulorum
1 Proximal sheaths red-brown, scabrous; culms scabrous on angles; perigynia ellipsoid to obovoid. > 2
2 Proximal sheaths with blades, fronts veinless; apex of perigynium obtuse or rounded. Carex scopulorum var. bracteosa
2 Proximal sheaths bladeless, fronts with persistent veins; apex of perigynium acute. Carex scopulorum var. prionophylla
... more about "Carex scopulorum"
Lisa A. Standley +, Jacques Cayouette +  and Leo Bruederle +
T. Holm +
Alta. +, B.C. +, Yukon +, Calif. +, Colo. +, Idaho +, Mont. +, Oreg. +, Utah +, Wash. +  and Wyo. +
Amer. J. Sci. +
Illustrated +  and Endemic +
Carex sect. Acutae +, Carex sect. Cryptocarpae +  and Carex sect. Temnemis +
Carex scopulorum +
Carex sect. Phacocystis +
species +