Erysimum nanum Boiss. & Hoh. in Boiss., Diagn. Pl. Orient. 8: 23. 1849.

Type: “Hab. in cacuminibus alpium Hasartschal montis Elbrus alt. 1000'. Kotschy Nº 487”.

Holotypus: IRAN: “Pr. cacumi in alpibus Hasartschal in partibus occidentalibus m. Elbrus”, 10000' [3050 m], 12.VII.1843, Kotschy 487 (G-BOIS [G00332134]; iso-: BM [BM001031449], BP, FI [FI 005675], G [G00343205], GJO, KW [KW000127962], LE [LE00013005], MO [MO3831820], P [P02272738, P02272739], TUB, W [W0026724]) .

= Erysimum caespitosum DC., Syst. Nat. 2: 497. 1821.

Notes. – Because Boissier based the species description solely on the unicate in his herbarium, the first lectotypification of the name by POLATSCHEK & RECHINGER (1968: 290) and second by POLATSCHEK (2011: 421) based on the W rather than the G-BOIS duplicate were not needed.

The W duplicate slightly differs from the holotype in the locality and elevation and is recognized as a questionable isotype.