Vietnam, Ha Giang Prov., Bac Me Distr., Phieng Luong Municipality, around Phieng Luong village about 4 km to SW of Phieng Luong Municipality headquarter 22º39’29’’N, 105º19’35’’E.
Slightly logged primary closed evergreen broad-leaved forest on slopes of remnant mountains composed with solid highly eroded crystalline and partially shale limestone at elev. 1000-1200 m a.s.l.
Lithophytic creeping herb. Flowers dull light yellowish to yellowish-green, Not rare.