N. Vietnam, Ha Giang prov., Dong Van distr., Ho Quang Phin municipality (N 23°11′ E 105°15′), 48.2 km to 36° of Ha Giang city. Remnants of dry mossy open coniferous forest with Pseudotsuga brevifolia along tops of remnant limestone karst ridge at elev. 1250-1300 m a.s.l. Lithophyte fern on shelves of shady cliffs. Rare.
NTH 3359 06 Oct. 1999
Collectors: N.T. Hiep, N.Q. Binh, L. Averyanov, P. Cribb.