1. Echia capensia;Buek;Linnaea,1837
2. Buys, M.H., 1997. A systematic revision of Lobostemon (Boraginaceae). Unpublished PhD Thesis, University of Stellenbosch.
3. The stigma and style of Lobostemon (Boraginaceae) and their systematic implications;Buys;South African Journal of Botany,2001
4. The systematic value of the leaf indumentum in Lobostemon (Boraginaceae);Buys;Bothalia,2005
5. Boraginaceae cymes are exclusively scorpioid and not helicoid;Buys;Taxon,2003