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7b. SCHOENOPLECTUS (Reichenbach) Palla sect. MALACOGETON (Ohwi) S. G. Smith & Hayasaka, J. Jap. Bot. 76: 340. 2001.
Scirpus Linnaeus sect. Malacogeton Ohwi, Mem. Coll. Sci. Kyoto Imp. Univ., Ser. B, Biol. 18: 97. 1944
Plants perennial; rhizomes spreading, conspicuous, long, weak, soft, flaccid; tuber occasionally present, terminal (and sometimes subterminal). Culms 0.5–2–3 mm wide. Leaves all basal; blades often flaccid. Inflorescences 1–3 times branched or capitate or of 1 spikelet. Spikelets: scales with usually 3–11 distinct or obscure parallel ribs (veins), at least in proximal part of spikelet, apex entire or obscurely emarginate, usually mucronate. Flowers: perianth segments bristlelike, spinulose; amphicarpic flowers absent. Achenes trigonous, 2.5–4.5 mm, smooth.
Species 4 or 5 (3 in the flora): North America, e Asia.
The North American species are the most aquatic of all North American Schoenoplectus (S. G. Smith and E. Hayasaka 2001).
Lower Taxa
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