M.  Abbasi, Attar, F., and Nejad, F. Ghahremani, ?Anatomical studies on several species of Heliotropium L. in Iran?, Notulae Scientia Biologicae, vol. 3, no. 4, pp. 35-43, 2011.

L.  Cavalheiro, Ranga, N. Taroda, and Furlan, A., ?Tournefortia L. (Boraginaceae): espécies do Brasil extra-amazônico?, Hoehnea, vol. 38, no. 2, pp. 221?242, 2011.

K. G.  Tamanyan, ?Checklist of Boraginaceae Juss. family in Armenia (in Russian)?, Takhtajania, vol. 1, pp. 60?69, 2011.

R.  Muhaidat, Sage, T. L., Frohlich, M. W., Dengler, N. G., and Sage, R. F., ?Characterization of C3?C4 intermediate species in the genus Heliotropium L. (Boraginaceae): anatomy, ultrastructure and enzyme activity?, Plant, Cell & Environment, vol. 34, no. 10, pp. 1723?1736, 2011.

F.  Luebert, Hilger, H. H., and Weigend, M., ?Diversification in the Andes: Age and origins of South American Heliotropium lineages (Heliotropiaceae, Boraginales)?, Molecular Phylogenetics and Evolution, vol. 61, no. 1, pp. 90 - 102, 2011.

S.  Ibáñez, Luebert, F., and Gómez, M., ?Primer registro de Heliotropium amplexicaule (Heliotropiaceae) en Chile?, Gayana Botánica, vol. 68, no. 1, pp. 89 - 92, 2011.

F.  Luebert, Brokamp, G., Wen, J., Weigend, M., and Hilger, H. H., ?Phylogenetic relationships and morphological diversity in Neotropical Heliotropium (Heliotropiaceae)?, Taxon, vol. 60, no. 3, pp. 663 - 680, 2011.