窄颖赖草 zhai ying lai cao

Elymus angustus Trinius in Ledebour, Fl. Altaic. 1: 119. 1829; Aneurolepidium angustum (Trinius) Nevski; Leymus angustus subsp. macroantherus D. F. Cui; Triticum angustum (Trinius) F. Hermann.

Culms solitary or tufted, 60–100 cm tall, 3- or 4-noded, glabrous, or pubescent below nodes and spike. Leaf sheath grayish green, usually shorter than internodes, smooth or slightly scabrous; ligule 0.5–1 mm, membranous, apex obtuse; leaf blade glaucous, rolled, 15–25 × 0.5–0.7 cm, stiff, abaxial surface subsmooth, adaxial surface smooth, apex acute. Spike erect, 15–20 × 0.7–1 cm; rachis pubescent. Spikelets 2(or 3) per node, 1–1.4 cm, with 2 or 3 florets; rachilla puberulent. Glumes covering base of first lemma, subequal or proximal glume slightly shorter, 10–13 mm, linear-lanceolate, 1-veined. Lemma lanceolate, obscurely 5–7-veined, densely puberulent, apex mucronate or acuminate; first lemma 10–14 mm including awn; callus pubescent. Palea slightly shorter than lemma, ciliate along keels. Anthers 2.5–3 mm. Fl. and fr. Jun–Aug.

Grassy places, meadows; 2000–2100 m. Gansu, Nei Mongol, Ningxia, Qinghai, Xinjiang [Kazakhstan, Kyrgyzstan, Mongolia, Russia, Turkmenistan, Uzbekistan; SW Asia, Europe].

This species is used for forage.

The new combination Leymus angustus (Trin.) Pilger var. macroantherus (D. F. Cui) L. B. Cai & X. Su (Bull. Bot. Res., Harbin 27(6): 654. 2007) appeared after publication of the family treatment for the Flora of China.