This section is from the book "British Wild Flowers - In Their Natural Haunts Vol5-6", by A. R. Horwood. Also available from Amazon: A British Wild Flowers In Their Natural Haunts.
The habitat of this orchid is woods, mountain woods, etc. The habit is erect. The stem is erect. The stem is downy above, solitary. The leaves are many-veined, rounded, egg-shaped to lance-shaped, oblong, longer than the internodes, the upper ones egg-shaped, oblong. The sheaths are close below. The bracts exceed the flowers, the lower being- leaflike, narrow. The flowers are pendulous, numerous, in a raceme, nearly all on one side of the stalk, green, the lip purple, with white or yellow margins. The sepals are broadly egg-shaped, the petals white, egg-shaped to lance-shaped. The lip may be as long as or shorter than the lance-shaped sepals. The labellum is round to heart-shaped with a bent-down point, broader than long, scalloped. The terminal lobes have thickened ridges on the disk. The flower-stalk is shorter than the ovary. The basal hunches are smooth. The plant is 1-3 ft. in height, flowering in July and August, and is a herbaceous perennial.
Helleborine atroviridis, W. R. Linton. - This species is found in Derbyshire and elsewhere, and closely resembles the last, from which it is distinguished by the labellum having 2 side hunches and 1 median, linear hunch.
Helleborine violacea, Bor. = H.purpurata, Druce. - The habitat of this species is woods. The habit is like that of H. latifolia. The plant grows in clusters. The stem and leaves are purple-tinted. The lower leaves are 3-4 by \\-2 in., egg-shaped, lance-shaped, the upper narrowed, passing into slender bracts, and the latter are longer than the oblong, downy ovaries. The flowers are violet-purple. The sepals are oblong to lance-shaped, more pointed than in H. latifolia. The tip of the lip is as broad as long, and sub-triangular, less than the sepals and petals. The hunches are plaited, scalloped. The stalks are shorter than the downy ovary. The label is longer than broad, entire, with a narrow point. The plant is 1-3 ft. in height, flowering in August, and is a herbaceous perennial.
The habitat of this species is woods and copses. The habit is erect, the stem tufted. The leaves are oval to oblong, lance-shaped, the upper narrower, the bracts longer than the hairless ovary. The flowers are creamy-white, distant, nearly erect. The sepals and petals are egg-shaped to oblong, blunt. The terminal lobe of the lip is rounded, erect, yellow. The lip has raised, longitudinal lines. The plant is 9-18 in. in height, and flowers in May and June, and is a herbaceous perennial.
The habitat of this plant is hilly woods and copses. The habit is erect, the stem nearly solitary, slender. The leaves are egg-shaped, lance-shaped, not so long as in the last species. The bracts are not so long as the hairless ovary, the upper minute. The flowers are white, and narrower. The sepals, especially the outer, are more acute. The lip has several raised white lines and a yellow spot in front, and is blunt. The plant is 1-2 ft. in height, flowering in May, and is a herbaceous perennial.