Elymus ciliaris in Flora of China @ efloras.org

14. Elymus ciliaris (Trinius ex Bunge) Tzvelev, Novosti Sist. Vyssh. Rast. 9: 61. 1972.

纤毛披碱草 xian mao pi jian cao

Culms solitary or tufted, usually geniculate at base, sometimes erect, 40–130 cm tall, 1–5 mm in diam. Leaf sheath glabrous, or pilose at base; leaf blade flat, 9–25 × 0.3–1 cm, glabrous to scabrous, pilose or pubescent, or densely so. Spike erect or nodding, 10–22 cm; rachis scabrous, margin hispid. Spikelets 1(or 2) per node, green, 10–22 mm excluding awns, with 5–12 florets. Glumes oblong-lanceolate or elliptic-lanceolate, proximal one 6–11 mm, distal one 7–13 mm, 5–7-veined, scabrous, ciliate, or white hirsute along veins and margin, apex acute, acuminate, or pointed. Lemma oblong-lanceolate or oblong, scabrous to hispid or both, margin shortly ciliolate to long ciliate, apex pointed or awned; first lemma 7–12 mm; awn often reflexed, 1–30 mm. Palea oblong-ovate, much shorter than lemma, scabrous or ciliolate along keels distally, apex truncate. Fl. and fr. May–Jul.

Mountain slopes, moist meadows, roadsides; 1200–1600 m. Anhui, Fujian, Gansu, Guizhou, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Nei Mongol, Ningxia, Shaanxi, Shandong, Shanxi, Sichuan, Yunnan, Zhejiang [Japan, Korea, Mongolia, Russia].

1 Leaf blade glabrous to scabrous (2)

+ Leaf blade pubescent or pilose to densely so (4)

2 (1) Lemma scabrous abaxially, margin ciliolate; palea scabrous along keels distally. 14c var. hackelianus

+ Lemma hispid abaxially, margin long ciliate; palea ciliolate along keels distally (3)

3 (2) Lemma apex with awn 10–30 mm. 14a var. ciliaris

+ Lemma apex pointed or with awn 1–3(–7) mm. 14b var. submuticus

4 (1) Glumes elliptic-lanceolate, ciliate along veins and margin, apex pointed; leaf blade densely pilose on both surfaces. 14f var. lasiophyllus

+ Glumes oblong-lanceolate, scabrous or white hirsute along veins and margin, apex acute or acuminate; leaf blade densely pubescent on both surfaces and margin, or pubescent on both surfaces and white pilose along veins and margin (5)

5 (4) Glumes scabrous along veins and margin; lemma scabrous or hispidulous abaxially, margin shortly ciliolate, first lemma 9–12 mm; culms 4–5 mm in diam.; leaf blade densely pubescent on both surfaces and margin. 14d var. amurensis

+ Glumes white hirsute along veins and margin; lemma punctate-scabrous and densely hispid throughout, first lemma 7–9.5 mm; culms 1–2 mm in diam.; leaf blade pubescent on both surfaces, white pilose along veins and margin. 14e var. hirtiflorus