Carex arcta


Ill. Carex, 155, plate 497. 1867.

Common names: Carex dru
Synonyms: Carex canescens var. oregana L. H. Bailey Carex canescens var. polystachya Boott Carex heleonastes var. scabriuscula Kükenthal Carex kunzei
Treatment appears in FNA Volume 23. Treatment on page 321. Mentioned on page 317, 312.

Plants densely cespitose; rhizomes short. Culms erect, slender, 15–80 cm, very rough distally. Leaves: sheaths pale to gray-brown abaxially, inner band thin, hyaline, conspicuously purplish dotted, concave at summit; ligules acute, longer than wide; blades pale to gray-green, flat, 15–50 cm × 2–4 mm, shorter than to exceeding culms. Inflorescences erect, ovoid-oblong, 1.5–4 cm × 7–12 mm; proximal bracts (sometimes also 2d) bristlelike-prolonged, from short to clearly exceeding spikes, distal bracts usually scalelike. Spikes 5–15, gynecandrous, proximal often slightly separate, distal closely approximate (sometimes hardly recognizable), containing 10–20 perigynia, sessile, oblong, 5–10 × 4–6 mm. Pistillate scales hyaline with green center, often brown tinged, ovate, shorter than perigynia, apex obtuse to short-cuspidate. Perigynia spreading-ascending, greenish, often brown in age, several-veined, ovate, widest near base, 2–3(–3.5) × 1.25–1.5 mm, minutely papillose (membranous); beak abaxial suture conspicuous, 0.75–1.25 mm, margin serrulate. Achenes pale brown, ovate, 1.25–1.5 1 mm, dull to slightly glossy. 2n = 60.

Phenology: Fruiting Jun–Sep.
Habitat: Swampy (coniferous) woods and thickets, wet meadows
Elevation: 0–2000 m


V23 567-distribution-map.jpg

Alta., B.C., Man., N.B., Ont., Que., Yukon, Calif., Idaho, Maine, Mass., Mich., Minn., Mont., N.H., N.Y., Oreg., Vt., Wash., Wis.


Selected References


Lower Taxa

... more about "Carex arcta"
Heikki Toivonen +
Carex dru +
Alta. +, B.C. +, Man. +, N.B. +, Ont. +, Que. +, Yukon +, Calif. +, Idaho +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, N.H. +, N.Y. +, Oreg. +, Vt. +, Wash. +  and Wis. +
0–2000 m +
Swampy (coniferous) woods and thickets, wet meadows +
Fruiting Jun–Sep. +
Ill. Carex, +
Illustrated +  and Endemic +
Carex canescens var. oregana +, Carex canescens var. polystachya +, Carex heleonastes var. scabriuscula +  and Carex kunzei +
Carex arcta +
Carex sect. Glareosae +
species +