《中国植物志》|| 禾本科 GRAMINEAE ||赖草属 Leymus Hochst. ||赖草 Leymus secalinus (Georgi) Tzvelev

8．赖草（山西植物生态调查报告）图版5: 7-11
Leymus secalinus (Georgi)Tzvel. in Pl. Asiae Centr. 4: 209. 1968. ——Leymus dasystachys (Trin.) Pilger in Engl. Bot. Jahrb. 74: 6. 1947. ——Triticum secalianum Georgi, Bemerk. einer Reise 1: 198. 177.——Elymus dasystachys Trin. in Ledeb. Fl. Alt. 1: 120. 1829. p. p. ——Ancurolepidium dasystachys(Trin. )Nevski in Kom. Fl. URSS 2: 706. 1934; 禾本科图说432.图365.1959; 中国高等植物图鉴5: 87.图7004. 1976.
多年生，具下伸和横走的根茎。秆单生或丛生，直立，高40-100厘米，具3-5节，光滑无毛或在花序下密被柔毛。叶鞘光滑无毛，或在幼嫩时边缘具纤毛；叶舌膜质，截平，长1-1.5毫米；叶片长8-30厘米，宽4-7毫米，扁平或内卷，上面及边缘粗糙或具短柔毛，下面平滑或微粗糙。穗状花序直立，长10-15（24）厘米，宽10-17毫米，灰绿色；穗轴被短柔毛，节与边缘被长柔毛，节间长3-7毫米，基部者长达20毫米；小穗通常2-3稀1或4枚生于每节，长10-20毫米，含4-7（10）个小花；小穗轴节间长1-1.5毫米，贴生短毛；颖短于小穗，线状披针形，先端狭窄如芒，不覆盖第一外稃的基部，具不明显的3脉，上半部粗糙，边缘具纤毛，第一颖短于第二颖，长8-15毫米；外稃披针形，边缘膜质，先端渐尖或具长1-3毫米的芒，背具5脉，被短柔毛或上半部无毛，基盘具长约1毫米的柔毛，第一外稃长8-10（14）毫米；内稃与外稃等长，先端常微2裂，脊的上半部具纤毛；花药长3.5-4毫米。花、果期6-10月。
产新疆、甘肃、青海、陕西、四川、内蒙古、河北、山西、东北等省区。生境范围较广，可见于沙地、平原绿洲及山地草原带。苏联、朝鲜、日本也有分布。模式标本采自阿勒泰。

《Flora of China》|| Poaceae || Leymus ||赖草 Leymus secalinus

15. Leymus secalinus (Georgi) Tzvelev, Rast. Tsentr. Azii. 4: 209. 1968.

赖草 lai cao

Culms solitary or tufted, 18–100 cm tall, 2–5-noded, smooth, glabrous, but densely puberulent below spike. Leaf sheath smooth, glabrous but margin ciliate when young; ligule 1–1.5 mm, membranous, apex truncate; leaf blade flat or rolled, 8–30 × 0.4–0.7 cm, abaxial surface scabrous or smooth, adaxial surface scabrous or pubescent, or both surfaces densely pubescent. Spike erect, grayish green, brown, or brownish, (6–)10–15(–24) × 0.1–1.7 cm; rachis pubescent; internodes 3–7(–20) mm. Spikelets (1 or)2 or 3(or 4) per node, 1–2.2 cm, with 2–7 (–10) florets; rachilla pubescent; internodes 1–1.5 mm. Glumes not covering base of first lemma, narrowly lanceolate to nearly subulate, shorter than spikelet, obscurely 1–3-veined, scabrous, apex mucronate to acuminate. Lemma lanceolate, 5-veined, pubescent, or glabrous above middle, margin membranous, apex acuminate or with awn 1–3 mm; first lemma 8–10(–14) mm; callus villous. Palea shorter than or equaling lemma, apex slightly bifid. Anthers 2–4 mm. Fl. and fr. Jun–Oct.

Mountain slopes, stony and aleurite slopes, grassy places, lake banks, alkaline swales and pebbles; 2900–4200 m. Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shanxi, Sichuan, Xinjiang, Xizang [India, Japan, Korea, Kazakhstan, Kyrgyzstan, Mongolia, Russia, Turkmenistan, Uzbekistan].

This species is used for forage.