Erysimum nasturtioides Boiss. & Hausskn. in Boiss., Fl. Orient. Suppl.: 40. 1888. Type: “Hab. ad nives regionis alpinae montium Kellal et Ssebsekuh ditionis Bachtiaris Persiae occidentalis (Haussk.!)”. Lectotypus (first step designated by POLATSCHEK, 2011: 441; second step designated here): IRAN: “In m. Kellal & Sebsekuh, dit. Bachtiariorum”, IX.1868, Haussknecht s.n. (G-BOIS [G00154048]; isolecto-: B [B100068761], JE [JE00001855], K [K000075411], P [P00531931]). Notes. – There are two sheets in G-BOIS, and POLATSCHEK (2011: 441), who lectotypified the species and designated the JE specimen as the lectotype, overlooked the fact that Haussknecht’s collection includes plants with fully mature fruit and others in flower, and they must have been from substantially different elevations from the two localities given in the protologue. A second step lectotypification is needed to correct JE to G-BOIS and consider the fruiting material as the lectotype. The G-BOIS lectotype is a collection folder of two sheets each with three plants, of which one sheet has all three plants with mature fruit, and the other has two with mature fruit and one in flower. Unfortunately, there is no way of knowing the locality from which Haussknecht collected the plants with mature fruit or with flower. Despite that, POLATSCHEK’S (2011) lectotypification based on the JE duplicate is rejected.

Published as part of AL-Shehbaz, Ihsan A. & Barriera, Gabrielle, 2019, Typification of Edmond Boissier's Cruciferae (Brassicaceae) names enumerated in Flora Orientalis, pp. 1-193 in Boissiera 72 on page 42, DOI: 10.5281/zenodo.7630433