Hoa Binh Prov., Lac Son Distr., Tu Do Municipality, Mon village, around point 20°24’52”N 105°19’41”E. Secondary evergreen dry broad-leaved forest on steep rocky slopes of remnant mountain composed with highly eroded marble-like solid crystalline limestone at elevation about 300 m a.s.l. Very common. CPC 1386a 23 March 2011 Coll.: N.Q.Hieu, L.Averyanov, N.T.Hiep, P.K.Loc, P.V.The, N.T.Vinh, T.B.Ngan, N.Tap, D.D.Dao, V.T.Ha.
Fl. in cultivation at 20 May 2016. Flowers purple.
Coordinates (geographic position):20° 24′ 52″ N, 105° 19′ 41″ E ±1000 mRecord creation: 2019-05-23, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01054550 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01054550