Laos, Khammouane prov., Boualapha distr., Nong Seng village, southern sandstone slopes at summit of Phou Chuang (Poujeuang) Mt. around point 17°35'00.3"N, 105°47'35.6"E. Primary evergreen mixed and coniferous dense wind-formed forest at elev. 1000-1400 m a.s.l. Terrestrial herb in mossy shady place on mountain top. Flowers greenish, lip dull reddish. Not common. 4 May 2018, L. Averyanov, Khang Sinh Nguyen, T. Maisak, Littideth Xaiyavongsa, Siphanom Keovankham, AL 639a.
Coordinates (geographic position):17° 35′ 0.3″ N, 105° 47′ 35.6″ E ±1000 mRecord creation: 2019-01-11, Leonid Averyanov, Microtek 1600. Processing status: work_status_1Citation: Specimen LE 01048811 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01048811