Lindley, J. & Paxton, J. (1851), Paxton's Flower Garden 1: 134 [tax. nov.]

• Type: (not designated).

Brieger, F.G. in Schlechter, F.R.R. (July 1981), Dendrobiinae. Die Orchideen Edn. 3, 1A(11/12): - [secondary reference]

• Lectotype: Onychium undulatum Blume

Schuiteman, A. (16 March 2012), Typification of infrageneric taxa in Dendrobium (Orchidaceae). Muelleria 30(1): 7 [secondary reference]

• Type: Onychium subulatum Blume - Dendrobium subulatum (Blume) Lindl.) lectotype chosen by Brieger (1981), who mistakenly wrote 'Onychium undulatum', a name which does not exist; Onychium subulatum is the only sepcies of Onychium which belongs to sect. Strongyle) [= Dendrobium sect. Aporum Blume]

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