Named after Gustav Mann (1836-1916), Royal Botanic Gardens, Kew, gardener and plant collector on the Niger Expedition in West Africa from 1859 to 1862 and in India for the Indian Forest Service (1863-91). (PC).
WCM Protologue Reference:
Rchb.f., Otia Bot. Hamburg.: 109 (1881)
Stem short, erect, terete, few-leaved. Leaves with a long-petiolate base dilating into an amplexicaul sheath at base; lamina ovate, green and sometimes tessellated with white spots. Inflorescence pubescent; peduncle slender, bearing several well-spaced, lanceolate, sheathing bracts; floral bracts glabrous, subequal in length to the pedicel plus ovary. Flowers resupinate, glabrous or pubescent on outer surfaces of sepals, not opening widely, pinkish brown. Dorsal sepal forming with the petals a deeply concave hood over the column. Lateral sepals spreading above, connate and forming a spur-like mentum below, narrower than the dorsal sepal; mentum adnate to the ovary for its entire length. Petals obliquely oblong, upper margins adnate to dorsal sepal. Labellum united below to the lateral sepals; hypochile cucullate, with erect sides, oblong when spread, margins papillate, basal half containing rows of fleshy appendages, base with two marginal, reflexed or backwards- directed, fleshy calli; epichile broadly ovate or deeply calceiform, shortly apiculate or emarginate. Column with a nectary adnate to ovary; anther transversely oblong; pollinia bipartite, attached by short caudicles to viscidium; rostellum apex retuse; stigma oval, plate-like; staminodes falcate, wing-like, lateral on either side of the anther cap and enclosing it, scalloped on margins. Ovary narrowly obconical, geniculate or straight, glabrous or pubescent, untwisted. Capsule elliptic-conical. Seeds not seen. (PC).