Dendrobium densiflorum is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Dendrobieae, subtribe: Dendrobiinae,  
Genus Dendrobium   section: Densiflora 
Infraspecific taxa recognized within Dendrobium densiflorum: infraspecific taxa
This species is found in C. Himalaya to Hainan.