日本碱茅 ri ben jian mao

Perennial, tufted. Culms erect, 30–100 cm tall. Uppermost leaf sheath long, usually enclosing base of inflorescence; ligule 2–3 mm; leaf blades soft, 10–20 cm, 1–3 mm wide. Panicle 10–20(–30) cm; branches 3–5 per node, erect and appressed to axis, spiculate to base, scabrid. Spikelets 4–6 mm, pale green, florets 3 or 4; glumes lanceolate, lower glume 2–2.5 mm, 1-veined, upper glume ca. 3 mm, 3-veined; lemmas 2.5–3.5 mm, base pubescent, apex acuminate; anthers 0.7–0.8 mm. Fl. Jun–Jul. 2n = 28.

Sandstone seashores, saline grassy places. Liaoning, Nei Mongol [Japan, Korea, Russia (Far East)].