Fam. Orchidaceae

Phaius columnaris C.Z.Tang & S.J.Cheng

N.Vietnam, Bac Kan Prov., Cho Don Distr., Ban Thi Municipality, village Phia Khao, around point 22º16'58''N, 105º31'20''E at elevation 800-900 m a.s.l. (Lung Chang and Lung Li mountains). Primary broad-leaved evergreen closed and coniferous (with Pinus kwangtungensis) forest on very steep slopes and cliffs along tops of rocky ridge composed with solid marble-like stratified limestone. Lithophytic and terrestrial herb among limestone shady rocks. Pseudobulbs cylindric to m 0.5 m tall and 6 cm in diamenter. Not common.

No HAL 4717a 20 May 2004 (Photo only).

Collectors: L.Averyanov, N.T.Hiep, P.V.The, N.T.Vinh.