Son La Prov., Van Ho Distr., Chieng Xuan Municipality, Co Hong village, territory of Xuan Nha natural reserve, Pha Luong Mountain. Primary coniferous and mixed forest with Pinus cernua on very steep slopes along ridge edge composed by brown sandstone at elevation 1200-1400 m a.s.l. around point 20°41’40.5’’N 104°39’24.7’’E. Lithophytic and terrestrial undershrub on mossy very steep slopes and cliffs along ridge edge. Flowers pink, anther yellow. Locally common.
Nghe An Prov., Ky Son Distr., Na Ngoi Municipality, eastern slopes of Phu Xai Lai Leng Mountain. Primary very humid broad-leaved forest on steep mountain slopes composed of sandstone and gray shale at elevation 2400-2500 m a.s.l. around point 19°12’17.7’’N 104°11’06.6’’E. Terrestrial creeping herb. Flowers purple. Very common from 2400 to 2700 m a.s.l.