Forster, P.I. (11 December 2001), Hydnophytum ferrugineum (Rubiaceae: Hydnophytinae), a new species of ant-plant from Cape York Peninsula, Queensland. Austrobaileya 6(1): 103-106, Fig. 1 APC [tax. nov.]

• Type: Queensland. Cook District: Timber Reserve 14, Leo Creek, 9 July 1997, P. I. Forster PIF21406 et al. (holo BRI [3 sheets + spirit]; iso: K, MEL).

taxonomic synonym: Hydnophytum sp. 1 [n/a] taxonomic synonym: Hydnophytum sp. [n/a]

• APC Dist.: Qld

• Etymology: The specific epithet is based on the Latin ferrugineus and alludes to the colour of the dense hairs present on the inflorescences of this species.

Henderson, R.J.F. in Henderson, R.J.F. (ed.) (2002), Postscript. Names and Distribution of Queensland Plants, Algae and Lichens: 282 [secondary reference]

Cooper, W.E. & Cooper, W.T. (2004), Fruits of the Australian Tropical Rainforest: 442 [secondary reference]

Jebb, M.H.P. & Huxley, C.R. (2019), The tuberous epiphytes of the Rubiaceae 7: a revision of the genus Hydnophytum. Blumea 64: 39, Fig. 9, Map 3 [secondary reference]

taxonomic synonym: Hydnophytum sp. 1 [n/a]

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