For Samolus
Cholewa, A.F. 2009b. Samolus. In Flora of North America Editorial Committee. 2009. Flora of North America north of Mexico. Volume 8, Magnoliophyta: Paeoniaceae to Ericaceae. Oxford Univ. Press, New York, NY. 585 pp. Google Scholar
Henrickson, J. 1983. A revision of Samolus ebracteatus (sensu lato) (Primulaceae). Southw. Nat. 28: 303-314. Google Scholar
Ståhl, B., and M. Källersjö. 2004. Reinstatement of Bonellia (Theophrastaceae). Novon 14: 115-118. Google Scholar