Dien Bien Prov., Tua Chua Distr., Xa Nhe Municipality, around point 21°52′35”N 103°24′21”E.
Highly degraded primary evergreen broadleaved dry forest on very steep slopes and on tops of remnant mountains composed with solid limestone at elevation 850-1050 m a.s.l.
Lithophytic herb in crevices of vertical shady high cliff. Flowers purple. Not common.
CPC 2228 11 April 2011 Coll.: L.Averyanov, P.K.Loc, N.Q.Hieu, N.T.Vinh.