Alyssum horebicum Boiss. in Ann. Sci. Nat., Bot. ser. 2, 17: 156. 1842.

Type: “[Aucher-Eloy] N. 257, in monte Horeb”.

Holotypus: EGYPT: “in monte Horeb”, 1830, Aucher-Eloy 257 (P [P02272286]) .

= Alyssum homalocarpum (Fisch. & C.A. Mey.) Boiss., Fl. Orient. 1: 285. 1867.

Notes. – Despite DUDLEY’S (1965a: 211) listing of an isotype at G, there is no such material of A. horebicum in the Geneva herbaria, and the species description was based on the unicate at P that Boissier annotated and Dudley did not examine.

Alyssum horebicum was reduced by Boissier in Flora Orientalis to synonymy of A. homalocarpum Fisch. & C.A. Mey.