N.Vietnam, Bac Kan Prov., Ba Be Distr., Nam Mau Municipality: Ao Tien. Ba Be National Park around point 22(26′958N 105(37′112′'E.
Selectly logged primary evergreen closed broad-leaved forest on slopes composed with crystalline highly eroded marble-like limestone at elevation 172- 200 m a.s.l.
Climbring herb on rock in shady place, stem scculence very easy broken,up to 40 - 70 cm long, sometime henring. Leave with petiole red, beneath red vein, supper green with pale- white large points.Common in West and south slope around Ao Tien.
HLF 645 24 Dec. 2002.
Coll. J.Regalado, Nguyen Tien Hiep, Do Hoang Chung, Vu Hong Van. Grant from Henry Luce Foundation.