FLORA OF VIETNAM
Apocynaceae

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. Lithophytic forb vine up to 10 m lg on shady
limestone cliffs along stream at 40-60 m a.s.l. Not common.

NTH 3790 23 Oct. 1999

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