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FOC | Family List | FOC Vol. 22 | Poaceae | Elymus

17. Elymus gmelinii (Ledebour) Tzvelev, Rast. Tsentr. Azii. 4: 216. 1968.

真穗披碱草 zhen sui pi jian cao

Culms laxly tufted, slender, 60–100 cm tall, 1.5–3 mm in diam. at base. Leaf sheath smooth, glabrous, but retrorsely pubescent at base; leaf blade flat or involute, 9–20(–26) × 0.2–0.8 cm, abaxial surface glabrous, adaxial surface scabrous or puberulent. Spike erect or nodding, usually secund, 9–15 cm. Spikelets 1 per node, yellowish green or tinged purplish, 15–25 mm, with (3–)5–7 florets. Glumes oblong-lanceolate or lanceolate, subequal and 10–15 mm or proximal one 6–11 mm and distal one 9–12 mm, 5–7-veined, scabrous along veins, apex acute or acuminate. Lemma lanceolate, hispidulous throughout; first lemma 10–12 mm; awn divaricate, 2.5–4.5 cm. Palea equaling or subequaling lemma, hispid along keels, apex subobtuse or emarginate. Anthers 2.5–3.5 mm. Fl. and fr. Jun–Aug.

Forest margins, mountain slopes, roadsides; 600–2600 m. Gansu, Hebei, Heilongjiang, Henan, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shanxi, Xinjiang, Yunnan [Japan, Kazakhstan, Korea, Kyrgyzstan, Mongolia, Russia, Turkmenistan, Uzbekistan].

1 Culms 60–80 cm tall, 1.5–2 mm in diam. at base; glumes unequal: proximal one 6–11 mm, distal one 9–12 mm.   17a var. gmelinii
+ Culms 75–100 cm tall, up to 3 mm in diam. at base; glumes subequal, 10–15 mm.   17b var. macratherus


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