Son La Prov., Moc Chau Distr., Chieng Son comm., Pha Luong village, Pha Luong Mountains.
Primary and secondary evergreen broad-leaved forest on very steep slopes and cliffs of highly eroded red-brown sandstone at elevation 1000-1050 m a.s.l. around point 20°42’02.1N 104°37’23.1E.Lithophytic and occasionally terrestrial, rosulate herb on shady mossy cliffs. Flowers pink-purple, anthers yellow. Locally very common.