Carex atratiformis Britton

Scrabrous black sedge (en)

Species

Angiosperms > Poales > Cyperaceae > Carex

Characteristics

Plants loosely cespitose. Culms 20–70 cm, distally finely scabrous. Leaves 2.5–5 mm wide. Inflorescences: proximal bracts shorter than or exceeding inflorescences; spikes distinct, spreading or the proximal pendent and often separate, elongate, 10–25 × 5–8 mm; lateral 3–6 spikes pistillate, long-pendunculate; terminal spike gynecandrous. Pistillate scales light to dark brown with hyaline margins, lanceolate, longer than and as broad as perigynia, midvein same color as body, inconspicuous or lighter in color, conspicuous, raised, prominent, sometimes short-mucronate. Perigynia ascending, yellow brown or chestnut, veinless, ovate or elliptic, 2.5–3 × 1.5–1.75 mm, apex abruptly beaked, distally papillose; beak 0.4–0.5 mm, bidentate, smooth. Achenes filling proximal 1/2 or less of perigynia.
More
Tufted, phyllopodic, 3–9 dm; main lvs 2–5 mm, much shorter than the slender stems; terminal spike mostly pistillate; lateral spikes 2–5, short-cylindric, 1–2 cm, spreading or drooping, often with a few basal staminate fls; peduncles slender, the lower 1–4 cm, the upper shorter; lowest bract lf-like, about equaling the infl, the upper very small; pistillate scales ovate to oblong, as wide and long or a little longer than the perigynia, dark brown throughout, acute to minutely cuspidate; perigynia elliptic, much flattened, 2.6–3.9 mm, half to two-thirds as wide, sharp-edged at the 2 ribs, otherwise nerveless or nearly so, rounded above to a very short, shallowly bidentate beak. Open meadows and exposed ledges; Lab. to Yukon, s. to the mts. of N. Engl. and the vicinity of Lake Superior.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
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Mature height (meter) 0.2 - 0.7
Root system fibrous-root
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Environment

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Hardiness (USDA) 4-9

Usage

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Cultivation

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Images

Carex atratiformis unspecified picture

Distribution

Carex atratiformis world distribution map, present in Canada, Micronesia (Federated States of), and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:45808-2
WFO ID wfo-0000344717
COL ID R86X
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR) Link

Synonyms

Carex atratiformis Carex ovata Carex raymondii Carex atrata subsp. atratiformis Carex atratiformis subsp. raymondii Carex atratiformis subsp. atratiformis