FLORA OF VIETNAM Orchidaceae Paphiopedilum helenae Aver.
N. Vietnam, Bac Can prov., Na Ri distr., Kim Hy municipality, vicinities of Lung Hin Con village (N 22°17′ E 106°03′), 27 km to 55° of Bac Can city. Primary evergreen mixed mossy forest with Pseudotsuga brevifolia along tops of karst remnant limestone ridge at elev. 700-750 m a.s.l. Adpressed lithophytic forb in crevices of shady mossy vertical cliff of N exposition. Rare, but locally abundant.