Type Hoa Binh Prov., Lac Son Distr., Tu Do Municipality, Mon village, around point 20°25’29”N 105°19’36”E. Primary broadleaved forest on steep rocky slopes of remnant mountain composed with solid crystalline highly eroded limestone at elevation about 500-700 m a.s.l. 25 March 2011. Coll.: L.Averyanov, L.Osinovetz, T.Maisak, et al., CPC 1566b.
Coordinates (geographic position):20° 25′ 29″ N, 105° 19′ 36″ E ±1000 mRecord creation: 2019-04-06, Leonid Averyanov, PhotoScan D1Citation: Specimen LE 01050399 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01050399