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Diane et al. 2016. In Kadereit, J.W., and V. Bittrich. 2016. The families and genera of flowering plants. XIV. Flowering plants – Eudicots – Aquifoliales, Boraginales, Bruniales, Dipsacales, Escalloniales, Garryales, Paracryphiales, Solanales (except Convolvulaceae), Icacinaceae, Metteniusaceae, Vahliaceae. Springer, Berlin. 412 pp.
Diane, N., H. Förther, & H.H. Hilger. 2002. A systematic analysis of Heliotropium, Tournefortia, and allied taxa of the Heliotropiaceae (Boraginales) based on ITS1 sequences and morphological data. Amer. J. Botany 89: 287-295
Feuillet, C. 2019. New combinations in Heliotropium for four New World species of Tournefortia (Heliotropiaceae, Boraginales). Phytoneuron 2019-63: 1-2. Published 23 December 2019. ISSN 2153 733X
Luebert, F. 2013. A revision of Heliotropium sect. Cochranea (Heliotropiaceae). Kew Bulletin, 68: 1-54.
Refulio-Rodríguez, N.F., and R.G. Olmstead. 2014. Phylogeny of Lamiidae. Amer. J. Bot. 101: 287-299.
Ward, D.B., and P.R. Fantz. 1977. Keys to the flora of Florida -- 3, Boraginaceae. Phytologia 36: 309-323
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