Polystachya aurantiaca Schltr. 1913 Photo courtesy of © Lourens Grobler.
Common Name The Golden Polystachya
Flower Size .4" [1 cm]
Found in northeastern Madagascar in tropical woods at elevations of 150 to 700 meters as a small to medium sized, hot to warm growing lithophyte with elongated pseudobulbs carrying 3, lineart-ligualte leaves that blooms in the summer on a terminal, to 8" [to 20 cm] long, often paniculate, several flowered inflorescence
This determination may be incorrect as the plant is from Zambia
References W3 Tropicos, Kew Monocot list , IPNI ; Flora of Madagascar Perrier 1939; Orchids of Madagascar Hermans 2007; Field Guide to the Orchids of Madagascar Cribb & Herman 2009 photo ?