Graphorkis Thouars in Nouv. Bull. Sci. Soc. Philom. Paris 1: 318 (1809).
Homotypic Names:
Eulophiopsis Pfitzer, Entwurf. Anordn. Orch.: 105 (1887).
Heterotypic Synonyms:
Graphorchis Thouars, Cahier six Planches: t. 3 (1819), orth. var.

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.
Trop. Africa, W. Indian Ocean

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; accessed 22/07/2019
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.