Linnaeus, C. (1 May 1753), Species Plantarum 2: 639 (err. typ. 939). [tax. nov.]

• Type: "Habitat in Italie, Siciliae humentibus, duris."

Eichler, Hj. (1965), Supplement to J.M.Black's Flora of South Australia (Second Edition, 1943-1957): 284 [secondary reference]

Curtis, W.M. (1967), Angiospermae: Plumbaginaceae to Salicaceae. The Student's Flora of Tasmania 3: 539 [secondary reference]

common name: Bear's-breech [n/a]

Barker, R.M. (12 September 1986), A taxonomic revision of Australian Acanthaceae. Journal of the Adelaide Botanic Gardens 9: 74-75 APC [secondary reference]

• APC Dist.: WA (naturalised), SA (naturalised), Qld (doubtfully naturalised), NSW (naturalised), Vic (naturalised), Tas (naturalised)

de Salas, M.F. & Baker, M.L. (2016), Tasmanian vascular plant census. A Census of the Vascular Plants of Tasmania, including Macquarie Island: 6 [secondary reference]

Parker, C.M. & Percy-Bower, J.M. (31 March 2016), Updates to Western Australia’s vascular plant census for 2015. Nuytsia 27: 2 [secondary reference]

Brown, G.K. & Bostock, P.D. (December 2019), Appendix A: New names and name and status changes 2018 to 2019. Introduction to the Census of the Queensland Flora 2019: 6 [secondary reference]

---