N.Vietnam, Bac Kan Prov., Ba Be Distr., Nam Mau Municipality: mountaine near Ban Cam, from Northern slope to the top (423 m a.s.l.) Ba Be National Park around point 22(26′596 N 105(36′ 198 E.
Selectly logged primary evergreen closed broad-leaved forest on top mountain ( almost on Northern slope and top).composed with crystalline highly eroded marble-like limestone at elevation 423 m a.s.l.
Epilith . Very common on Northern slope and top.
HLF 704 27 Dec. 2002.
Coll.Nguyen Tien Hiep, Do Hoang Chung, Vu Hong Van, Nguyen Tap,Nguyen Van Thong. Grant from Henry Luce Foundation.