AFRICAN

ORCHIDS

Imerinaea Schltr., Repert. Spec. Nov. Regni Veg. Beih. 33: 151 (1924).
Description:
Terrestrial herbs with a creeping rhizomes, up to 30 cm tall. Roots emerging from beneath pseudobulbs. Pseudobulb cylindrical– ovoid, unifoliate, arranged in a linear series on rhizome. Leaf erect, ligulate–oblanceolate, acute, petiolate, non-articulate, thin, papery, plicate. Infl orescence erect, from apex of pseudobulb, longer than leaf; peduncle bearing a few distant sheathing sterile bracts; bracts lanceolate, one-nerved. Flowers subnutant, non-resupinate, borne almost at a right angle to ovary. Sepals and petals yellowish to reddish, free, subsimilar, oblanceolate, apiculate. Labellum cornetshaped, entire, broadly obovate, obscurely trilobed above, lateral margins inrolled, apical margin crenulate, lacking a spur, ninenerved, papillose all over; callus raised, linear with a dilated apex and a fl eshy, farinaceous base. Column lacking auricles, puberulant on ventral surface; anther conical, papillose, pollinia four in two unequal appressed pairs, ovoid, attached to a saddle-shaped tegula; staminodes present; rostellum trilobed, the midlobe triangular, lateral lobes broadly rounded. Ovary ribbed.
Distribution:
Madagascar
Species:

 

Imerinaea madagascarica Schltr. N. & C. Madagascar.

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 1/16/2010
Bibliography and References:
Pridgeon, A.M., Cribb, P.J., Chase, M.A. & Rasmussen, F. eds. (1999). Genera Orchidacearum Oxford Univ. Press.
Pridgeon, A.M., Cribb, P.J., Chase, M.A. & Rasmussen, F. eds. (2001). Genera Orchidacearum 2. Oxford Univ. Press.
Pridgeon, A.M., Cribb, P.J., Chase, M.A. & Rasmussen, F. eds. (2003). Genera Orchidacearum 3. Oxford Univ. Press
Berg Pana, H. 2005. Handbuch der Orchideen-Namen. Dictionary of Orchid Names. Dizionario dei nomi delle orchidee. Ulmer, Stuttgart

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