FLORA OF VIETNAM
Orchidaceae
Bulbophyllum retusiusculum Reichenb.f.

Phu Tho Prov., Tan Son Distr., Xuan Son Municipality, Du village, around point 21°02′55”N 104°56′51”E.

Primary broad-leaved forest on very steep rocky slopes and cliffs of Svoi Lap remnant mountain composed with highly eroded solid marble-like limestone at elevation 600-700 m a.s.l.

Clustering epiphyte on small mossy tree on rocky mountain top. Rare.

HAL 12712g 17 February 2009
Coll.: L.Averyanov, P.K.Loc, N.T.Vinh, L.T.Son.

Flowered under cultivation in July-September 2009. Flowers odorless, lateral sepals pure yellow-orange, median sepal and petals yellow-orange with purple-violet stripes, lip orange-red, pedicel and ovary violet. Photos.