Son La Prov., Van Ho Distr., Xuan Nha Municipality, Muong An village, territory of Xuan Nha natural reserve. Primary broad-leaved evergreen humid forest on very steep slopes and cliffs of remnant mountain composed by solid highly eroded crystalline limestone at elevation 800-1000 m a.s.l. around point 20°45′06.5″N 104°46′37.8″E. Lithophytic herb on mossy vertical shady cliffs. Flowers light blue. Very common. 13 November 2013 CPC 7053 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, N.D.Thang, L.D.Qui
Coordinates (geographic position):20° 45′ 6.5″ N, 104° 46′ 37.8″ E ±1000 mRecord creation: 2020-02-07, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01067548 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01067548