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

86. Elymus pendulinus (Nevski) Tzvelev, Rast. Tsentr. Azii. 4: 218. 1968.

缘毛披碱草 yuan mao pi jian cao

Culms 60–110 cm tall, glabrous throughout, or puberulent or pubescent at nodes, sometimes also densely retrorsely pubescent in upper part (exserted from leaf sheath). Leaf sheath glabrous, or retrorsely pubescent at least at base; leaf blade flat, 10–25 × 0.3–0.9 cm, glabrous, scabrous, or adaxial surface pilose. Spike slightly nodding, 12–25 cm. Spikelets 1 per node, green or purplish at base, 15–25 mm excluding awns, with 4–9 florets. Glumes lanceolate or oblong-lanceolate, 3–7-veined, sometimes scabrous along veins, margin sometimes laxly ciliolate, apex acute or pointed; proximal glume 7–9 mm; distal glume 7–10 mm. Lemma lanceolate or oblong-lanceolate, scabrous abaxially, pilose distally, laxly hirsutulous near apex, or hirsutulous throughout, margin ciliate distally; first lemma 8–11 mm; awn erect or slightly reflexed, slender, 15–30 mm. Palea slightly shorter than or subequaling lemma, ciliolate along keels distally, pubescent between keels. Anthers ca. 2 mm. Fl. and fr. May–Jul. 2n = 28*.

Forests, mountain slopes, valleys, meadows, along rivers; 100–2400 m. Gansu, Hebei, Heilongjiang, Henan, Jilin, Liaoning, Nei Mongol, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Yunnan [Japan, Korea, Mongolia, Russia].

1 Culms glabrous throughout (rarely pubescent at nodes).   86a subsp. pendulinus
+ Culms puberulent or densely pubescent, at least at nodes   (2)
2 (1) Culms puberulent at nodes; leaf sheath glabrous; spikelets with 6–9 florets.   86b subsp. multiculmis
+ Culms densely retrorsely pubescent in upper part (exserted from leaf sheath) and at nodes; leaf sheath retrorsely pubescent, especially proximally; spikelets with 4 or 5 florets.   86c subsp. pubicaulis


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