Apostasia elliptica J.J.Sm. 1920 SECTION Adactylus
Photo by © Peter O'Byrne and The Swiss Orchid Foundation at the Jany Renz Herbaria Website
Drawing by © Miss R. van Crevel/ de Vogel
LATER 
Common Name The Elliptic Apostasia
Flower Size .6" [1.5 cm] long,
Found in Malaysia, Borneo and Sumatra in lowland rainforests at elevations of sea level to 700 meters as a small to medium sized, hot to warm growing terrestrial with rather remote, oblong to ovate-ovblong, more or less acuminate, to 36 nerved, 5 prominent, distinctly sheathed leaves that blooms in the later spring on a terminal, pendulous, branched, 10 to 20 flowered inflorescnece without sterile bracts at the base and with triangular, not apically filiform, acuminate, 3 to 5 nerved floral bracts and carrying white flowers.
The flowers in the photo above are not completely open.
CAUTION Some references put this species as a synonym of A latifolia and it may well be, I await better references.
Synonyms Adactylus ellipticus (J.J.Sm.) Cretz. 1941
References W3 Tropicos, Kew Monocot list , IPNI ; Blumea 17: 333 de Vogel 1969 drawing fide; Checklist of the Orchids of Borneo Wood & Cribb 1994 drawing fide; Orchids of Borneo Vol 3 Wood 1997 drawing/photo fide; Malesian Orchid Journal Vol 5 2010 photo fide;
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