内蒙古扁穗草 nei meng gu bian sui cao

Schoenus rufus Hudson, Fl. Angl., ed. 2, 1: 15. 1778; Blysmopsis rufa (Hudson) Oteng-Yeboah; Blymus exilis (Printz) Ivan; B. rufus subsp. exilis Printz; Scirpus rufus (Hudson) Schrader.

Rhizomes slender. Culms 3-20 cm tall, subterete, clothed at base with brown bladeless leaf sheaths. Cauline leaves as long as or shorter than culm; leaf blade brown, narrowly linear, thickly crescentic in cross section, apex ± obtuse. Involucral bract dark reddish brown, leaflike or glumelike, many veined, apex acute. Inflorescences consisting of 4-7 spikelets arranged in a distichous spike, 0.7-1.7 cm. Spikelets oblong-ovoid, 5-6 mm, 2- or 3-flowered, apex ± obtuse. Glumes elliptic-ovate, ca. 5 mm, 2- or 3-veined, apex obtuse. Perianth bristles usually absent. Stamens 3; anthers 3-4 mm; connective apex ca. 2 mm. Stigmas 2. Nutlet yellowish, shortly stipitate, oblong-ovoid, ca. 3.5 × 1.5 mm, plano-convex, base subrounded. Fl. and fr. Jun-Sep. 2n = 40.

Wet saline meadows, wet sandy places; 500-5200 m. Heilongjiang, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Xinjiang [Kashmir, Kazakhstan, Kyrgyzstan, Mongolia, Pakistan, Russia, Tajikistan, Uzbekistan; Europe, North America].