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. Terrestrial herb with very narrow leaves in shady palces among rocks on very steep mossy shady rocky slope. Common. 13 November 2013 CPC 7070a / 13273 Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, N.D.Thang, L.D.Qui Fl. in cult. in August 2016. Flowers pure uniform white. Photos, 15 August 2016, L. Averyanov.
Coordinates (geographic position):20° 45′ 6.5″ N, 104° 46′ 37.8″ E ±1000 mRecord creation: 2019-04-11, Leonid Averyanov, PhotoScan D1Citation: Specimen LE 01049410 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01049410