Bolikhamsai prov., Thaphabat distr., Nam Bon village, Phou Khao Khouay national park, Tad Xai Waterfall, around point 18?27'25.9''N 103?08'17.5''E. Degraded primary and secondary evergreen dry forest along rocky river on eroded sandstone at elev. About 350 m a.s.l. Terrestrial herb in shady places on sandy soil. Leaves uniform green and sometimes with few unclear yellowish spots. Locally very common. AL 150 9 December 2015 L.Averyanov, T.Maisak. 2 living plants only. Flowered in 2 May 2017, Flowers dark dirty purple, stigma purple with radiate white markings. Photos.
Coordinates (geographic position):18° 27′ 25.9″ N, 103° 8′ 17.5″ E ±1000 mRecord creation: 2019-04-06, Leonid Averyanov, PhotoScan D1. Processing status: work_status_1Citation: Specimen LE 01050033 // Virtual herbarium of Komarov Botanical Institute RAS — http://re.herbariumle.ru/01050033