小穗发草 xiao sui fa cao

Aira sukatschewii Poplavskaja; Deschampsia cespitosa var. festucifolia Honda; D. cespitosa var. microstachya Roshevitz; D. cespitosa subsp. sukatschewii (Poplavskaja) Chiapella & Probatova; D. orientalis (Hultén) B. S. Sun; D. sukatschewii (Poplavskaja) Roshevitz; D. sukatschewii subsp. orientalis (Hultén) Tzvelev.

Culms 10–70 cm tall. Leaf blades 1–2 mm wide. Panicle open, 6–18 cm; branches flexuous, smooth or scaberulous. Spikelets 2.5–5 mm; glumes subequaling spikelet; lemmas awned between lower 1/3–1/2; awn usually longer than lemma.

Flood plains, river sand and gravel, wet meadows; below 3800 m. Heilongjiang, Nei Mongol, Qinghai, Taiwan, Xinjiang, Yunnan [Japan, Korea, Mongolia, Russia (Far East, Siberia); North America].

Deschampsia cespitosa subsp. orientalis is the most common subspecies in E Asia, where it is a vicariant of subsp. cespitosa, which is native in Europe and western parts of Asia and introduced in E Asia.