Achnatherum calamagrostis, (L.) Beauv.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1980, Flora Europaea. Volume 5. Alismataceae to Orchidaceae (Monocotyledones), Cambridge: Cambridge University Press : 252

1. A. calamagrostis (L.) Beauv. , Agrost. 20,146 (1812)

( Calamagrostis argentea DC. , Lasiagrostis calamagrostis (L.) Link ).

Robust, caespitose perennial. Stems 60-120 cm, densely clothed in imbricate, coriaceous, scale-like leaf-sheaths at base when young. Leaves 2-3 mm wide, usually convolute when dry, gradually attenuate into the long, slender apex; sheaths smooth, glabrous or ciliate on margin and auricles; ligule minute. Panicle up to 30 cm, rather lax. Spikelets (6-)8-9 mm, shining, often purplish. Glumes lanceolate, acute, glabrous or shortly hairy, membranous, 3-veined. Lemma 3-4 mm, coriaceous, with patent hairs up to 4 mm on the back; awn c. 10 mm, straight or curved. Anthers 3-5-4 mm. 2« = 24. Rocky or stony ground, mainly in the mountains; calcicole. • 5. & S.C. Europe. Al Au Bu Ga Ge Gr He Hs It Ju Rm.

2. A. splendens (Trin.) Nevski , Acta Inst. Bot. Acad. Sci. URSS (Ser. 1) 4:224 (1937) ( Lasiagrostis splendens (Trin.) Kunth ). Like 1 but stems up to 250 cm; ligule c. 6 mm, more or less acute; panicle up to 50 cm; spikelets 5-6 mm; upper glume as long as lower; lemma 5-6 mm. Steppes and saline gravels. S.E. Russia, W. Kazakhstan. Rs (C, E). (Siberia, C. Asia.)