Babu, C.R. (1971), Thecagonum Babu: A new generic name in Rubiaceae. Bulletin of the Botanical Survey of India 11: 214 [comb. nov.]

basionym: Oldenlandia biflora L. legitimate

Halford, D.A. (9 September 1992), Review of the genus Oldenlandia L. (Rubiaceae) and related genera in Australia. Austrobaileya 3(4): 689 [nomenclatural synonym]

nomenclatural synonym of: Oldenlandia biflora L. legitimate

Neupane, S., Dessein, S., Wikström, N., Lewis, P.O., Long, C., Bremer, B. & Motley, T.J. (April 2015), The Hedyotis-Oldenlandia complex (Rubiaceae: Spermacoceae) in Asia and the Pacific: Phylogeny revisited with new generic delimitations. Taxon 64(2): 317 [nomenclatural synonym]

nomenclatural synonym of: Leptopetalum biflorum (L.) Neupane & N.Wikstr. legitimate

Gibbons, K.L. (June 2020), Hedyotis, Oldenlandia and related genera (Rubiaceae: Spermacoceae) in Australia: New genera and new combinations in an Asian-Australian-Pacific lineage. Taxon 69(3): 536 [nomenclatural synonym]

nomenclatural synonym of: Leptopetalum biflorum (L.) Neupane & N.Wikstr. legitimate

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