Thai Nguyen Prov., Dong Hy Distr., Tan Long Mun., Mo Ba vill., around point 21?45′24″N 105?52′34″E, 439 m a.s.l.
Occasionnally clustered in rather shady and wet places of heavily logged closed evergreen broad-leaved lowland forests on slopes of limestone mountains.
Perennial herb; inflorescence up to 0.2 m long; flowers whitish-pale-violet.
HAL 9092 23 Aug 2006 Collectors: Phan Ke Loc, Nguyen Tien Vinh and Nguyen Sinh Khang
Collected with the financial support from NYBG, U.S.A.