Dendrobium doloissumbinii J.J.Wood 2009SECTION Calcarifera
Different flower Angle Photo by © Sony Wibisono

To 
Common Name Dolois Sumbin's Dendrobium [Indonesian Orchid Enthusiast and Curator Sabah Parks Herbarium current]
Flower Size 1.2" [3 cm]
Found in Kalimantan and Sabah Borneo in hill forests at elevations of 600 to 700 meters as a small to medium sized, hot to warm growing epiphyte with up to 20, becoming pendent with age, sulcate, internoded stem carrying several towards the apex, narrowly elliptic, oblique apically, subacute to acute leaves that blooms in the spring with a short to .4" [1 cm] long, 1 to rarely 2 flowered inflorescence
CAUTION I am not convinced that this determination is correct so please use with caution. The downward positioned lip apex is the most troubling aspect of this determination.
Synonyms
References W3 Tropicos, Kew Monocot list , IPNI ; *Malesian Orchid Journal Vol 3 2009 photo/drawing hmm
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