Cao Bang Prov., Thong Nong Distr., Yen Son Municipality, Ngan Vai village, around point 22°46'53"N, 105°52'58.7"E. Primary fractionaly logged coniferous forest with Pseudotsuga sinensis along highly eroded rocky limestone ridge at elevation about 1300 m a.s.l. Tree to 15 m tall along mountain ridge and on high part of mountain slope. Very common, main dominant of the forest.
Record creation: 2026-03-21, Аверьянов Леонид ВладимировичCitation: Specimen LE 01204115 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01204115