Calamagrostis canescens subsp. vilnensis, (Besser) H. Scholz

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 : 237

(b) Subsp. vilnensis (Besser) H. Scholz , Ber. Deutsch. Bot. Ges. 77: 145 (1964)

( C. vilnensis Besser ex Schultes & Schultes fil. ):

Awn robust, longer, arising distinctly below the apex of lemma. Rhachilla-prolongation present. Germany and Baltic region.

The name C. vilnensis has sometimes been applied to the hybrid 4 x 6 ( C. x gracilescens (Blytt) Blytt ), which is intermediate between its parents in glume-shape, awn-length and the relative lengths of callus-hairs and lemma.

4x11 ( C. x hartmaniana Fries ) is rather like 11, but has unbranched stems, long leaves with white hairs on the upper surface, callus-hairs nearly as long as the lemma and a straight awn.