Megalorchis H.Perrier, Bull. Soc. Bot. France 83: 579 (1936 publ. 1937).
Description:
Plants having the appearance of Habenaria, with flowers of pure white and very large; sepals free, the laterals very enlarge basally forming a wide mentum with the base of the labellum, petals entire; base, labellum trilobed, lateral lobes short, median lobe linguiform, thick, sub articulate to its column very shorts and wide; anther horizontal, entirely resupinate, pollen cups small, lateral to the rostellum, separated from each other posteriorly by a low, very wide connective appendage; arms of the rostellum elongated and recurved behind, much longer that the channel of the anther and entirely free, viscidiums free, large, obtuse, cucullate, in the form of a small sphere, staminodes placed marginally and anteriorly to the rostellum.
Distribution:
Madagascar
Species:

World Checklist of Monocotyledons. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the Internet; http://www.kew.org/wcsp/monocots/ accessed 2/1/2010
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