Laos, Champasak province, Bolaven Plateau, road Paksong Ban Houay Kong, 1170 m a.s.l., N15,14.191 E106,25.694, epiphyte in canopy of tall tree. 26 November 2015, E.Konstantinov et al., AL 166 / K 392. Living plant, photo.
Flowered in 30 June 2016, flowers very fragrant, white, lip with yellow spot in center. Photos. L. Averyanov Ceratistylis siamensis? AL 167 / K 393