Dendrobium quadriferum Schltr., drawing R. Schlechter in Repert. Spec. Nov. Regni Veg. Beih. 21 (1923) t. 189, fig. 710
Dendrobium quadriferum Schltr., isotype specimen: Schlechter 17143 (L)
Dendrobium quadriferum Schltr., detail of isotype specimen: Schlechter 17143 (L)