Son La Prov., Moc Chau Distr., Chieng Son comm., Pha Luong village, Pha Luong Mountain system. Primary broad-leaved evergreen forest with Pinus cernua, Fokienia hodginsii and bamboo on eroded red-brown sandstone near mountain top at elevation 1350 m a.s.l. around point 20°41’36.4N 104°37’46.6E. Creeping terrestrial and lithophytis herb in shady, mossy place. Not rare near mountain top.