Bulbophyllum cogniauxianum is a species of orchid in the genus Bulbophyllum found in Brazil.
The rhizome thin, the bulbs are fairly distant from each other, conical, subterete, with a 2 cm high base and 1 cm thick monophylls. Leaves unifoliate at the base short-petiolate linear-oblong obtuse apex bilobed thick coriaceous 6-7 cm long 1-1.3 cm wide, scape with thin sheaths short, apex bearing a umbel with few flowers(3-6), minute lanceolate bracts scarcely shorter than the short ovaries. scarcely connate, pointed, carinate in the middle, with a small curved triangular label above the furrowed base, and on both sides slightly auricled anteriorly, not produced in the process: the foot of the column is very curved and arched. Column short not brachiate, stele short sharp, androclinium deeply excavated Flowers dirty purple, dorsal sepal 4 mm, petals 3.5 mm long, dorsal sepal 3 mm, petals 1.5-2 mm wide, lateral sepals 1 cm long 2 mm wide, labellum 1.25 mm long.[1]