Gymnadenia R. Br.

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 : 332

15. Gymnadenia R. Br. 2

Tubers laterally compressed, palmately lobed. Stem leafy. Flowers in a spike. Outer lateral perianth-segments patent or curved downwards, the outer median connivent with the inner lateral to form a galea. Labellum shallowly 3-lobed, directed downwards. Spur long, slender. Column short, erect. Rostellum long. Viscidia 2, long, linear; bursicles absent.

Spur 11-18 mm, longer than ovary 1. conopsea Spur 4-5 mm, not longer than ovary 2. odoratissima