SECTION Biseta J.J.Verm. ex N.Pearce , P.J.Cribb & Renz 2001

TYPE Species = Bulbophyllum bisetum Lindl. 1842

Epiphytes with a creeping rhizome giving rise to pseudobulbs carrying a single, persistent leaf that blooms on a 2 to many flowered, contracted or elongate racemose inflorescence with the rachis distinctly thickened or not and carrying resupinate or not flowers with the pedicel arising from the basal node slightly above the attachment of the floral bract. The ridges of the ovary usually extend between the sepals as teeth. The free dorsal sepal has 3 veins and the laterals are the same but are 1 to 1.6 times as long and are adherent along the lower margin and have 5 veins with the midvein adaxially keeled. The petals normally have a single vein, and the mobile lip has an unhinged thin ligament and is undivided. The column has the stigma proximally usually protruding and/or with a tooth. The column foot often has lateral wings near the apex. The stelida are almost 1/2 the length of the column and the upper margin is with or without a tooth while the lower margin has a tooth. The anterior surface of the anther is concave and the anterior margin is drawn out into a beak, There are 4 pollina.

There are about 6 species in montane forests up to 1900 meters within India, Thailand, Vietnam, penninsular Malaysia, Sumatra and Borneo

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 bisetum Lindl. 1842Assam, eastern Himalayas and Thailand

  2. Bulbophyllum bisetoides Seidenf. 1970 Thailand and Vietnam

  3. Bulbophyllum dewildei J.J. Verm. 1996 Sumatra

  4. *Bulbophyllum emunitum J.J.Verm. & A.L.Lamb 2008 Borneo

  5. Bulbophyllum pauzii P.O'Byrne & P.T.Ong 2014 penninsular Malaysia

  6. Bulbophyllum tipula Aver. 2016 Yunnan China and Vietnam

ReferencesW3 Tropicos, Kew Monocot list , IPNI ; Bulbophyllum of Borneo J J Verm, P O'Byrne and Lamb 2015 photos/drawing fide; Genera Orchidacearum Vol 6 Epidendroideae Pt 3 Pridgeon, Cribb Chase & Ramussen 2014;