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448c. Carex scirpoidea Michaux subsp. pseudoscirpoidea (Rydberg) D. A. Dunlop, Novon. 7: 355. 1998.
Carex pseudoscirpoidea Rydberg, Mem. New York Bot. Gard. 1: 78. 1900; C. scirpoidea var. pseudoscirpoidea (Rydberg) Cronquist
Plants not cespitose; rhizomes long. Culms erect, 5–31 cm. Leaves: sheaths and bases from previous year’s leaves persistent; blades widely V-shaped in cross section, to 21 cm × 3 mm. Scales ovate, 2.8 × 1.5 mm. Perigynia ovate, (1.5–)2–2.8(–3) × 1.5 mm, body tightly enveloping achene for entire length. Achenes 1.5–1.8 × 0.9–1.2 mm.
Fruiting Jun–Sep (depending on elevation). Dry ridge sites, fellfields with gravelly and noncalcareous soils; 3300–3900 m; B.C.; Calif., Colo., Idaho, Mont., Oreg., Utah, Wash., Wyo.
Compared to Carex scirpoidea subsp. pseudo-scirpoidea, C. scirpoidea subsp. scirpoidea occurs at relatively lower elevations and in wetter sites with calcar-eous soils.
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