SECTION Oreonastes G A Fischer & J J Verm in prep.

TYPE = Bulbophyllum oreonastes Rchb.f. 1881

Epiphytes or lithophytes with creeping rhizomes [patent in B teretifolium Schltr.] giving rise to 1 or 2 leaved pseudobulbs blooming on distichously, many flowered, elongate, racemose inflorescence with a resupinate or not flower, rachis thickened, sharply 4 edged, with 2 narrow, concave sides from which the flowers arise. The floral bracts are shorter or longer than the flowers with free sepals that are glabrous to papillose to sparsely hirsute abaxially. The lip is mobile, undivided or trilobed, with entire to erose to dentate margins that are thick and solid, the stelida are .04 to .048" [.1 to .12 mm] long and acuminate the anther abaxially has a dorsiventrally flattened protrusion higher than the anterior margin and carries 4 pollina.

At present there are 10 species in this section only from Africa in lowland forests rain forests, plantations, semi-deciduous forests and montane forests at elevations uo ti 2800 meters.

Entries below with an asterix are listed in publications by J J Vermeullen and so are more likely correct than ones without. Species with a question mark in front, seem to me to not conform and so please use with caution.

  1. Bulbophyllum acutibracteatum De Wild.1921 Liberia, Sierra Leone, Cameroon,Equatorial Guinea, Gabon, Gulf of Guinea Islands and Zaire

  2. Bulbophyllum concatenatum P.J.Cribb & P.Taylor 1980 Tanzania

  3. Bulbophyllum encephalodes Summerh. 1951 Nigeria, Burundi, Cameroon, Rwanda, Zaire, Kenya, Tanzania, Uganda, Malawi, Zambia and Zimbabwe

  4. Bulbophyllum fuscum Lindl. 1839 Guinea, Ivory Coast, Liberia, Nigeria, Sierra Leone, Central African Republic, Cameroon, Equatorial Guinea, Congo, Gabon, Rwanda, Zaire, Kenya, Tanzania, Angola, Malawi, Mozambique, Zambia and Zimbabwe

  5. Bulbophyllum horridulum J.J.Verm. 1986


  6. *Bulbophyllum lupulinum Lindl. 1862 Guinea, Ivory Coast, Nigeria, Sierra Leone, Togo, Congo, Zaire, Ethiopia Zambia

  7. *!Bulbophyllum oreonastes Rchb.f. 1881 Ghana, Guinea, Ivory Coast, Liberia, Nigeria, Sierra Leone, Central African Republic, Cameroons, Equatorial Guinea, Gabon, The Gulf Of Guinea Islands, Rwanda, Zaire, Tanzania, Uganada, Angola, Zambia and Malawi

  8. Bulbophyllum oxychilum Schltr. 1905 Ghana, Ivory Coast, Liberia, Nigeria, Central African Republic, Gabon, Zaire and Uganda

  9. *Bulbophyllum teretifolium Schltr. 1905 Cameroon

  10. Bulbophyllum unifoliatum De Wild. 1921 Rwanda, Zaire, Tanzania, Angola, Malawi, Mozambique, Zambia and Zimbabwe

References W3 Tropicos, Kew Monocot list , IPNI ; Genera Orchidacearum Vol 6 Epidendroideae Pt 3 Pridgeon, Cribb Chase & Ramussen 2014