17. Cheiranthus longifolius Vent., Jard. Malmaison 2: tab. 83. 1804.

Lectotypus (designated here): [SPAIN. Canary Islands, Tenerife]: Hort. Cels, Ventenat s.n. (G [G00341510]!; isolecto-: G-DC [G00149563]!).

= Erysimum heritieri Kuntze

Notes. – Specimens present in Ventenat’s herbarium clearly represent two gatherings. One of the collections came from Cels’s garden and the other is material brought back by Broussonet (G [G00341595], with a duplicate in G-DC [G00149716]). The gathering from Cels’s garden is a better specimen and is here designated as the lectotype.