Lai Chau Prov., Sin Ho Distr., Ma Quai Municipality, Tua Vang mountain ridge, around point 22°24′01″N 103°22′22″E.
Broad-leaved evergreen closed wet primary forest on steep mountain slopes composed with sandstone at elev. 1500-1650 m a.s.l.
Terrestrial herb up to 0.5 m tall in shady rocky places along small stream. Flowers yellow. Leaved dark velvety green above, dirty purple below. Locally common.
HAL 9987 18 Nov. 2006 Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.