AL-SHEHBAZ, I.A. 2002. New combinations in Brassicaceae (Cruciferae): Draba serpens is a Hemilophia and D. williamsii is a Lepidostemon. Edinburgh Journal of Botany. 59, 3 (Nov. 2002), 443–446. DOI:https://doi.org/10.1017/S0960428602000264.