Eriophorum angustifolium |
Eriophorum angustifolium subsp. angustifolium |
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many-spike bog cotton, many-spike cotton-grass, narrow-leaf cotton-grass, tall cottongrass, tall cottonsedge |
linaigrette à feuilles étroites, many-spike cottongrass, tall cottongrass |
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Habit | Plants colonial from long-creeping rhizomes. | |||||
Culms | to 100 cm × (0.8–)1–1.2 mm distally. |
20–100 cm. |
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Leaves | blades flat, tip trigonous, channeled in cross section, to 40 cm × 1.5–6(–8) mm; distal leaf blade much longer than sheath. |
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Inflorescences | blade-bearing involucral bracts 1–3, proximally blade, often sheath black, leaflike, longest 1–12 cm. |
larger involucral bracts 2–12 cm; peduncles 5–60 mm, glabrous or scabrous on angles. |
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Spikelets | (1–)2–10, in subumbels, patent or pendent, ovoid, 10–20 mm in flower, 20–50 mm in fruit; peduncles 5–60 mm, smooth or scabrous; scales lanceolate or ovate, 5–10 mm, with prominent midrib fading proximal to tip, apex ± acute; proximal scales without lateral ribs. |
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Flowers | perianth bristles 10 or more, white or pale yellow brown, 15–30 mm, smooth; anthers 2–5 mm. |
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Achenes | black, oblanceoloid, 2–5 mm. |
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Scales | brown to gray proximally, paler distally, usually with broad white membranous margins. |
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2n | = 58. |
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Eriophorum angustifolium |
Eriophorum angustifolium subsp. angustifolium |
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Phenology | Fruiting summer. | |||||
Habitat | Marshes, bogs, fens, meadows, shores | |||||
Elevation | 0–3500 m (0–11500 ft) | |||||
Distribution |
AK; CO; IA; ID; IL; IN; ME; MI; MN; MT; ND; NE; NM; NY; OR; SD; UT; WA; WI; WY; AB; BC; MB; NB; NS; NT; NU; ON; PE; QC; SK; YT; n Eurasia
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AK; CO; IA; ID; IL; IN; ME; MI; MN; MT; ND; NE; NM; NY; OR; SD; UT; WA; WI; WY; AB; BC; MB; NB; NL; NS; NT; NU; ON; PE; QC; SK; YT; SPM; Greenland; Eurasia |
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Discussion | eriophorum polystachion linnaeus is a rejected name Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 23, p. 23. | FNA vol. 23, p. 24. | ||||
Parent taxa | Cyperaceae > Eriophorum | Cyperaceae > Eriophorum > Eriophorum angustifolium | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Honckeny: Verz. Gew. Teutschl., 153. (1782) | unknown | ||||
Web links |