Petrosimonia in Mém. Acad. Imp. Sci. Saint-Pétersbourg, Sér. 7, 4(11): 19, 52. 1862 sec. Kühn (1993)
A genus of c. 12 species distributed in saline soils of central and southwest Asia, westwards to the east Mediterranean. Petrosimonia is a typical genus with bifurcate hairs. It forms a monophyletic group with Ofaiston within Caroxyleae (Akhani & al. 2007).