FLORA OF VIETNAM Orchidaceae Bulbophyllum andersonii (Hook.f.) J.J.Sm.
Son La Prov., Van Ho Distr., Xuan Nha Municipality, Muong An village, territory of Xuan Nha natural reserve.
Primary broad-leaved evergreen humid forest on very steep slopes and cliffs of remnant mountain composed by solid highly eroded crystalline limestone at elevation 800-1000 m a.s.l. around point 20°45′06.5″N 104°46′37.8″E.
Creeping epiphyte and lithophyte on on very steep mossy shady rocky slope near mountain top. Very common.
Fl. under cultivation at 20 July 2014. Flowers odorless, tepals dull yellowish finely marked with purple, lip white with numerous small purple marks, column white with purple spots, operculum light yellowish with large purple spot at front. Photos. L.Averyanov.