Scirpus atrocinctus Fernald

Blackgirdle bulrush (en), Scirpe à ceinture noire (fr)

Species

Angiosperms > Poales > Cyperaceae > Scirpus

Characteristics

Plants aggregated in dense tussocks; rhizomes branching, short, tough, fibrous. Culms: fertile ones upright or nearly so; nodes without axillary bulblets. Leaves 4–7 per culm; sheaths of proximal leaves brown; proximal sheaths and blades with septa few to many, conspicuous or inconspicuous; blades 25–63 cm × 3–6 mm. Inflorescences terminal; rays ascending or sometimes spreading, scabrous throughout or main branches smooth proximally, rays rarely with axillary bulblets; bases of involucral bracts usually blackish, not glutinous. Spikelets in open cymes, central spikelet of each cyme sessile, others usually pedicellate, spikelets ovoid or ellipsoid, 4–7 × 2–2.7 mm; scales usually blackish, at least distally, oblong-ovate or oblong-elliptic, 1.3–1.8 mm, apex rounded or very weakly apiculate, apiculus (if present) to 0.05 mm. Flowers: perianth bristles persistent, 6, slender, contorted, much longer than achene, smooth, projecting beyond scales, mature inflorescence appearing woolly; styles 3-fid. Achenes whitish, elliptic or obovate in outline, plumply trigonous or plano-convex, 0.7– 0.9 × 0.4–0.5 mm. 2n = 68.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
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Mature height (meter) -
Root system rhizome
Rooting depth (meter) -
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Nitrogen fixer -
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Environment

Light -
Soil humidity -
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Hardiness (USDA) 4-9

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
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Images

Scirpus atrocinctus unspecified picture

Distribution

Scirpus atrocinctus world distribution map, present in Canada, France, Micronesia (Federated States of), Malaysia, and United States of America

Conservation status

Scirpus atrocinctus threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:230211-2
WFO ID wfo-0000534586
COL ID 4VLPQ
BDTFX ID -
INPN ID 762085
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Scirpus atrocinctus Trichophorum atrocinctum Eriophorum cyperinum f. brachypodum Eriophorum cyperinum f. condensatum Scirpus atrocinctus f. brachypodus Scirpus atrocinctus f. atrocinctus Eriophorum cyperinum var. brachypodum Scirpus atrocinctus var. brachypodus Scirpus atrocinctus var. condensatus Eriophorum cyperinum var. condensatum Scirpus cyperinus var. brachypodus