AFRICAN

ORCHIDS

Graphorkis Thouars in Nouv. Bull. Sci. Soc. Philom. Paris 1: 318 (1809).
Synonyms:
Eulophiopsis Pfitzer in Engler & Prantl, Nat. Pflanzenfam. II, 6: 183 (1889).
Description:
Epiphytic, sympodial herbs. Pseudobulbs clustered, conical-ovoid to cylindrical-fusiform, with several nodes, partly covered by fibrous leaf bases; roots of two types, some attached to substrate and some aerial, erect. Leaves developing after flowering, petiolate, narrowly elliptic, acute or acuminate, thin-textured, plicate. Inflorescence paniculate, many-flowered; flowers resupinate, yellowish, marked with brown or purple. Sepals and petals free; lip 3-lobed, spurred at the base; disk with 2 keels. Column with hirsute basal auricles; rostellum elongate; pollinia 2, waxy, sessile, attached to a solitary viscidium.
Distribution:
Trop. Africa, W. Indian Ocean
Species:

Graphorkis concolor (Thouars) Kuntze, W. Indian Ocean.
Graphorkis concolor var. alphabetica F.N.Rasm. Seychelles, Réunion, Comoros, Madagascar
Graphorkis concolor var. concolor. Mascarenes.
Graphorkis ecalcarata (Schltr.) Summerh. NE. Madagascar.
Graphorkis lurida (Sw.) Kuntze, Trop. Africa.
Graphorkis medemiae (Schltr.) Summerh. NW. 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/ accessed1/20/2010
Bibliography and References:
Kurzweil H. 1987 Developmental studies in orchid flowers I: Epidendroid and vandoid species. Nordic J. Bot. 7. 427-42.
Cribb P. 1989 Flora of Tropical East Africa: Orchidaceae (part 3). Rotterdam: A A Balkema 413-651p.