Spiranthes romanzoffiana, Cham.

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 : 330

3. S. romanzoffiana Cham. , Linnaea 3; 32 (1828).

Roots cylindrical, relatively slender. Stem 12-25 cm, sparsely glandular-puberulent above. Leaves basal and cauline, linear-lanceolate to narrowly oblong, acute, suberect, the lower 7-12 cm x 5-13 mm, the upper cauline smaller but not reducedto scales, present during anthesis. Spike 3-6 x 2 cm, dense, with 12-35 flowers in 3 spiral rows. Bracts 10-17 mm, ovate, acuminate. Perianth c. 12 mm, white tinged with green orcream, all segments, including the labellum, connate in lower half. Labellum somewhat constricted below the sharply deflexed, crenulate apex. Flowering in mid- to late summer. 2« = 60. Damp, peatyground andlakeshores . Ireland, W. Scotland. S. W. England. Br Hb. (North America.)