Poaceae |
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Agropyron cristatum (L.) GAERTNER subsp. cristatum |
Agropyron cristatum (L.) GAERTNER subsp. cristatum |
Agropyron GAERTNER |
A. cristatum (L.) Gaertner in Novi Comment. Acad. Sci. Petrop. 14:540 (1770). Syn: Bromus cristatus L., Sp. Pl. 78 (1753)! Triticum cristatum (L.) Schreber, Beschr. Gras. 2:12, t. 23 f. 2 (1772)! Stems 20-70 cm, ± pubescent. Leaf blades usually 1.5-3 mm broad, scab-rid or pilose on upper surface, glabrous beneath or pubescent on both sides. Spike ovate, narrowly ovate, elliptic or narrowly elliptic, 1.5-5 cm, sometimes tinged purple. Glumes 3-5 mm, with 2-3 mm awn. Lemma 5-7 mm, with 3-4 mm awn. 1. Rachis fragile at maturity; spikelets closely pressed together; lemma densely pilose subsp. incanum 1. Rachis tough; spikelets with distinct gaps between them; lemma glabrous or sparsely pilose subsp. pectinatum 2. Spikelets glabrous var. pectinatum 2. Spikelets sparsely pilose var. imbricatum subsp. cristatum occurs in C. & E. Asia. Species doubtfully recorded |