FLORA OF VIETNAM
Rubiaceae
Ophyorrhiza sp.

N. Vietnam, Thai Nguyen prov., Vo Nhai distr., Than Sa municipality,
vicinities of Kim Son village (N 21°48′ E 105°54′), 23.3 km to 18° of
Thai Nguyen city. Primary dry broadleaved evergreen forest on very
steep rocky slopes of remnant karst limestone ridge at elev. about 250
m a.s.l. Lithophytic forb up to 0.5 m in open cliff. Not common.

NTH 3878 24 Oct. 1999

Collectors: N.T. Hiep, P.K. Loc, L. Averyanov.