FLORA OF VIETNAM
Rubiaceae
Ophiorrhiza sp.

N. Vietnam, Hoa Binh prov., Mai Chau distr., Hang Kia municipality,
near Pa Khong village, (20°44′40′'N, 104°52′32′'E). Primary
broad-leaved evergreen dry forest with Pinus kwangtungensis along tops
of highly eroded remnant karst limestone ridge at elev. 1300-1440 m
a.s.l. Lithophyte herb on crevices of vertical shady cliff. Flowers
white with light violet tint. Not common.

HAL 850 9 April 2001

Collectors: N.T.Hiep, L.Averyanov, N.T.Vinh, D.T.Doan.