Dak Nong province, Krong No district, Nam Nung commune, Nam Nung natural conservation area, lithophytic or rarely terrestrial herb, on very steep slopes or shady cliffs near mountain tops in semi-evergreen broad-leaved forests dominant by Dipterocarpaceae (Dipterocarpus alatus, Hope asp., and Lagerstromia spp.) at elevation 600–800 m, flowering time April – May, collected at 26 April 2017, Nguyen Huy Phong, AL 397, voucher herbarium specimen is deposited in Herbarium of the National Institute of Medicinal Materials, Hanoi (NIMM).
Fl. et coll. in horto 01 April 2021 L. Averyanov AL 397 Garden Number 17546.