Carex atherodes Spreng.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Cyperaceae
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Scientific Name
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Description
Species Description - Stems stout, 3–15 dm, arising singly or few together from long, coarse, deep-seated rhizomes, aphyllopodic, the lower sheaths soon breaking and becoming fibrillose; sheaths villous-hirsute all around, or sometimes only toward the ventral summit; blades elongate, 4–10 mm, usually hirsute beneath toward the base, tending to be septate-nodulose; bracts subtending the pistillate spikes sheathless or nearly so, but with elongate blade; spikes several, sessile or inconspicuously short-pedunculate, the lower pistillate and the upper staminate, or the middle one(s) androgynous; staminate spikes 2–6 cm, pale, commonly stramineous, the scales short-awned; pistillate spikes cylindric, 2–10 × 1 cm, the scales stramineous or pale greenish and often largely scarious, narrow, tipped by a rough awn 1–5(–9) mm; perigynia crowded, ascending, pale greenish to stramineous, conspicuously 12–20-ribbed, glabrous, firm, 7–10 mm, lanceolate or lance-ovate, somewhat turgid-inflated below, more flattened toward the well developed beak, this with prominent, often divergent teeth 1.5–2.5(–3) mm; achene trigonous, loosely filling the lower part of the perigynium, continuous with the straight bony style; 2n=74. Marshes and shallow water; circumboreal, extending s. in Amer. to N.Y., W.Va., Mo., Colo., Utah, and Oreg.