Thai Nguyen Prov., Dong Hy Distr., Tan Long Mun., Mo Ba vill., around point 21?46′22″ N, 105?52′38″ E, 352 m a.s.l.
Scattered on slopes of limestone mountains, in rather open places of logged closed evergreen broad-leaved lowland forests . Lithophyte; perennial herb; flowers white. HAL 9112 23 Aug 2006 Photos Collectors: Phan Ke Loc, Nguyen Tien Vinh and Nguyen Sinh Khang
Collected with the financial support from NYBG, U.S.A.