Dendrobium undulatum var. gracile (synonym of Dendrobium discolor subsp. discolor)

Dendrobium undulatum var. gracile is species in  the family Orchidaceae  subfamily: Epidendroideae, tribe: Dendrobieae, subtribe: Dendrobiinae,  
Genus Dendrobium  This name is a synonym of Dendrobium discolor subsp. discolor
Infraspecific taxa recognized within Dendrobium undulatum: infraspecific taxa