16. Cheiranthus linearis Vent.,

Jard. Malmaison 2: sub tab. 83. 1804 [nom. illeg.] [non C. linearis Forssk.].

Lectotypus (designated here): [S PAIN. Canary Islands, Tenerife]: Hort. Cels, Ventenat s.n. (G [G00341602]!).

= Erysimum semperflorens (Schousb.) Wettst.

Notes. – Two specimens are present in Ventenat’s herbarium that clearly represent two gatherings. One of the collections came from Cels’s garden and the other from Malmaison [G00341604]. The first gathering is a better specimen and is here designated as the lectotype. Other collections exist from the material brought back by Broussonet while he served as Commissioner of commercial relations in Tenerife in the early 19 th century (Candolle, 1809). Those collections are here considered as elements of original material (G-DC [G00149541]).