矮针蔺 ai zhen lin

Scirpus pumilus Vahl, Enum. Pl. 2: 243. 1805; Baeothryon pumilum (Vahl) Á. Löve & D. Löve; Isolepis pumila (Vahl) Roemer & Schultes.

Rhizomes creeping, long, slender. Culms rather densely caespitose, 5-15 cm tall, slender, terete, grooved when dry. Leaves basal, semiterete, only apicalmost bearing a blade; leaf blade 0.7-1.6 cm, shorter than culm, very slender. Involucral bract glumelike, shorter than spikelet, apex mucronate. Inflorescences reduced to a single terminal spikelet, obovoid to ellipsoid, ca. 4.5 × 2.5 mm, few flowered. Glumes ovate to elliptic, ca. 2.5 mm, membranous, both surfaces yellowish brown, with 1 green vein, margin pale hyaline, apex obtuse; basal 2 glumes empty. Perianth bristles absent. Stamens 3; anthers linear-oblong; connective apex slightly evident beyond anthers. Style of medium length; stigmas 3. Nutlet blackish brown, obovoid, ca. 1.5 mm, 3-sided. Fl. and fr. May-Sep.

Stream margins in grasslands, moist places along valleys; 500-4700 m. Gansu, Hebei, Nei Mongol, Ningxia, NW Sichuan, Xinjiang, Xizang [Afghanistan, Kashmir, Kazakhstan, Kyrgyzstan, Mongolia, Nepal, Pakistan, Russia, Tajikistan, Uzbekistan; SW Asia, Europe, North America].