(modifié de Coste, Flore de la France 1937) :
Plante vivace de 250 cm, glabre, à tubercules oblongs en fuseau atténués en longue fibre
Écologie : (répartition d'après la flore) Bois, prés, marais, dans toute la France et en Corse.
Répartition hors de France : Europe ; Asie occidentale et boréale.
(modified from Butcher, British Flora 1961):
NOTE: the French text is more complete and up-to-date
A rather slender perennial, with the stem 15-30 cm tall, growing from two ellipsoid tubers. Stem with two ovate, elliptical, acute, entire, sheathing leaves at its base,
Ecology UK: (distribution according to flora) It [was] a rather common plant in woods and on grassy slopes on basic soils throughout the British Isles. [Now in serious decline, and extinct from many counties. Fairly current in the New Forest]
France:
Distribution outside France: ?
Fleurs : blanches, odorantes, en épi allongé multiflore assez lâche ; bractées égalant environ l'ovaire ; divisions latérales extérieures étalées, lancéolées obtuses, la supérieure et les 2 intérieures conniventes; labelle pendant, linéaire-obtus, entier ; éperon presque horizontal, filiforme en alène, arqué, l -2 fois plus long que l'ovaire; anthère étroite, à loges rapprochées et parallèles ; bursicule nulle; fossette stigmatique à bord épais.
Floraison France : Mai-juillet.
Flowers: about 8-12 mm diam., fragrant, in a rather short, rather lax, pyramidal raceme, subtended by linear-lanceolate bracts as long as the flower; outer perianth segments white, lanceolate, acute, spreading, inner smaller, connivent with the middle outer one to form the helmet; lip somewhat longer than the outer lobes, narrowly oblong, apex obliquely truncate; spur rather slender, acute, nearly twice as long as ovary. Anther cells parallel, basal glands about 1 mm apart, oval; stigma rounded
Flowering UK: Mid June-mid July.
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