Erysimum gayanum Boiss., Fl. Orient. 1: 196. 1867

[nom. illeg.].

 Erysimum aucherianum J. Gay, Erysim. Nov: 9. 1842.

Type: “Habitat in Persiae borealis provinciâ Aderbigianâ, inter Tebris et Ardebil (Auch. exsicc. nº 4113! in herb. mus. Par., Deless. et Webb.)”.

Lectotypus (designated by GERMAN, 2014: 17): IRAN: “ Aderbidjan ”, s.d., Aucher-Eloy 4113 (G [G00002420]; isolecto-: BM, G [G00002421], K [K000075632], LE, P [P00535975, P02272695], W [W0026675]) .

= Erysimum collinum (M. Bieb.) Andrz. ex DC., Prodr. 1: 198. 1824.

Notes. – Boissier in Flora Orientalis listed the earlier and validly published E. aucherianum in synonymy of E. gayanum, a name that he proposed to replace the former because he believed that his earlier published aucheri (see entry below) is the same as aucherianum .

He did not examine any of the duplicates at G because G00002421 belongs the Moricand herbarium, and G00002420, which was annotated by Gay in 1841, belongs to the Delessert herbarium. Furthermore, he did not annotate P00535975.

Boissier listed Aucher-Eloy 4415 both in Fl. Orient. 1: 196 as the type of E. gayanum and in Fl. Orient. 2: 260 as Astragalus mollis . A considerable search in the Geneva herbaria and P failed to find any species of Erysimum with a type collection number Aucher-Eloy 4415.

We agree with POLATSCHEK (2011: 486) and GERMAN (2014) in considering both species based on the same type, AucherEloy 4113 rather than 4415, though we follow the latter author in synonymizing them with E. collinum instead of recognizing E. aucherianum as distinct from E. collinum, as done by POLATSCHEK (2011).