Dendrobium teretifolium is accepted species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Dendrobieae, subtribe: Dendrobiinae,  
Genus Dendrobium   section: Teretifolia 
Infraspecific taxa recognized within Dendrobium teretifolium: infraspecific taxa
This species is found in SE. Queensland to E. New South Wales.