Grisebach, A.H.R. (1862), Flora of the British West Indian Islands 5: 485 [comb. et stat. nov.]

basionym: Tiaridium Lehm. legitimate

Johnston, I.M. (1928), I. Studies in the Boraginaceae - VII. Contributions of the Gray Herbarium of Harvard University 81: 18 [secondary reference]

• Type: Heliotropium indicum L.

Craven, L.A. (13 September 1996), A taxonomic revision of Heliotropium (Boraginaceae) in Australia. Australian Systematic Botany 9(4): 635 [secondary reference]

• Type: "(fide Johnston, Contr. Gray Herb. 81: 18 (1928)): H. indicum L."

nomenclatural synonym: Tiaridium Lehm. legitimate

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