Aerva, Fl. Aegypt.-Arab.: 170. 1775, nom. cons., sec. Townsend (1993)
- Type: Aerva tomentosa
The genus may not be monophyletic and includes two principal lineages (Thiv & al. 2006). One of these is was shown as sister to the remainder of the aervoid clade (represented by A. javanica Juss., Müller & Borsch 2005a) and the other (represented by A. leucura Moq., Müller & Borsch 2005b) as sister to Ptilotus. Further study of the Aervoid clade is needed to clarify generic concepts.