Trisetum sibiricum, Rupr.

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 : 223

17. T. sibiricum Rupr. , Beitr. Pfl. Russ. Reich. 2: 65 (1845).

Laxly caespitose perennial with glabrous stems 20-100 cm. Leaves 4—16 cm x O-3-O-8 mm, flat, glabrous or moderately hairy above. Sheaths glabrous or with very short appressed hairs. Panicle 2-5-16 x 1-5-3 cm, lax and elongate to dense and ovoid, brownish. Spikelets 5-2-8-5 mm. Glumes broadly hyaline, sparsely scabridulous, the lower £-£ as long as the upper. Rhachilla with hairs c. 1 mm; callus-hairs very short. Lemma 4- 5-5-8 mm, 2-fid; awn 5-10 mm, inserted c. £ of way from apex to base of lemma, strongly curved, scabridulous; callus-hairs very short. Anthers 2-2-5 mm. 2« =14. Wet meadows, rivergravels and scrub. U.S.S.R., southwards to c. 50° N. in C. Ukraine, and extending to N.E. Poland.?Ju Po?Rm Rs (N, B, C, W).