N.Vietnam, Bac Kan Prov., Ba Be Distr., Nam Mau Municipality: mountaine betwen Khau Cum to Nam Dai. Ba Be National Park around point 22(26′311N 105(36′ 669 E.
Selectly logged primary evergreen closed broad-leaved forest on top mountain composed with crystalline highly eroded marble-like limestone at elevation 386 m a.s.l.
epilith herb in shady and open place, common.
HLF 647 25 Dec. 2002.
Coll.Nguyen Tien Hiep, Do Hoang Chung, Vu Hong Van. Grant from Henry Luce Foundation.