Dendrobium crystallinum is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Dendrobieae, subtribe: Dendrobiinae,  
Genus Dendrobium   section: Dendrobium 
Infraspecific taxa recognized within Dendrobium crystallinum: infraspecific taxa
This species is found in Assam (Manipur) to China (S. Yunnan) and Indo-China.