20. O. bombyliflora Link in Schrader, Jour, für die Bot. 1799(2): 325 (1800) (O. oestrifera subsp. umbilicata (Desf.) Hayek). Plant 7-25 cm. Basal leaves oblong-lanceolate, acute, patent, the cauline erect, slightly sheathing. Spike 1 - to 5-flowered, lax. Outer perianth-segments 9-12 mm, ovate, obtuse, green, sometimes whitish, concave, the lateral patent or deflexed; inner c. i as long as the outer, triangular, purplish at base, greenish towards apex, velutinous. Labellum 8(—10) mm, deeply 3-lobed, the lobes gibbous, deflexed so that the labellum appears globose- inflated, brown or dark brown, partly papillose, partly glabrous, without an appendage; lateral lobes oblong, convex, villous, glabrous towards apex, with externally hairy basal protuberances; middle lobe transversely ovate or oblong; speculum scutelliform or 2-partite, bluish-violet, with paler margin. Connective obtuse. 2n = 36. Mediterranean region, C. & S. Portugal. ?A 1 B 1 Co Cr Ga Gr Hs It Ju Lu Sa Si.

Published as part of D. M. Moore (ed.), 1980, CCIII Orchidaceae, pp. 325-350 in Flora Europaea, Vol 5: Alismataceae to Orchidaceae, Camebridge :Cambridge University Press on page 349, DOI: 10.5281/zenodo.215522