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.
Shrub up to 4 m tall. Very common in open place at the top mountaine of Ba Be National Park.
HLF 713 27 Dec. 2002.
Coll.Nguyen Tien Hiep, Do Hoang Chung, Vu Hong Van, Nguyen Tap,Nguyen Van Thong. Grant from Henry Luce Foundation.