Gesneriaceae Didissandra evrardii Pellegr. Thai Nguyen Prov., Vo Nhai Distr., Than Sa Mun., Ngoc Son 2 vill., around point 21?51′09″ N, 105?53′51″ E, 253 m a.s.l.
Scattered in heavily logged closed evergreen broad-leaved lowland forests on slopes of limestone mountains. Lithophyte, perennial herb; flowers whitish. HAL 9195 30 Aug 2006 Photos Id. by Phan Ke Loc Collectors: Phan Ke Loc, Nguyen Tien Vinh and Nguyen Sinh Khang
Collected with the financial support from NYBG, U.S.A.