N. Vietnam, Son La prov., Moc Chau distr., Van Ho municipality, near Hua Tat village (20°46′35′'N, 104°46′31′'E). Coniferous forest with Pinus kwangtungensis, Podocarpus sp. and Calocedrus macrolepis along remnant limestone highly eroded ridge at elev. 1400-1500 m a.s.l. Lithophytic herb on open rocks. Flowers white, pleasant spicy fragrant. Not rare.