Eriophorum angustifolium Honck.

• Authority

  Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

• Family

  Cyperaceae

• Scientific Name

  Eriophorum angustifolium Honck.

• Description

  Species Description - Extensively colonial from creeping rhizomes; stems subterete, 2–6(–9) dm; sheaths with a dark border at the top; blades ± flat for most of their length, 2–8 mm wide, the uppermost one mostly as long as or longer than its sheath; invol bracts unequal, 2 or 3 foliaceous, the longest one equaling or generally surpassing the infl; spikelets 3–several, on compressed, smooth or minutely scabrous-hirtellous pedicels to 5 cm; scales tawny to drab or blackish-green, lance-ovate, with a slender midvein not extending to the very thin, hyaline-scarious tip; bristles white; anthers 2–4.5 mm; achene blackish, rather narrowly obovate, 2–3 mm, 2–3 times as long as wide; 2n=58, 60. Bogs and marshes; circumboreal, s. to Me., N.Y., Mich., Io., Colo., N.M., and Oreg. Fr June–Aug. (E. polystachion, a rejected name)

• Common Names

  thin-scale cotton-grass