| Leaves alternate, entire, on a strict or upright st.: lateral sepals sac-like at the base: valves of the pod with a strong mid- nerve. Much confounded with Matthiola, and the genera are not sufficiently distinct. In Cheiranthus, the lvs. are acute, hairs 2-parted and appressed, stigma more spreading, pod more flattened and seeds not thin- edged; and the fls. are prevailingly orange or yellow—Probably a score of species, in the Canary and Madeira Isls., Medit. region and E. and in N. Amer. The garden species are confused; a critical study may find that some of them belong to Erysimum or other genera. The genus hybridizes with Erysimum. | | Leaves alternate, entire, on a strict or upright st.: lateral sepals sac-like at the base: valves of the pod with a strong mid- nerve. Much confounded with Matthiola, and the genera are not sufficiently distinct. In Cheiranthus, the lvs. are acute, hairs 2-parted and appressed, stigma more spreading, pod more flattened and seeds not thin- edged; and the fls. are prevailingly orange or yellow—Probably a score of species, in the Canary and Madeira Isls., Medit. region and E. and in N. Amer. The garden species are confused; a critical study may find that some of them belong to Erysimum or other genera. The genus hybridizes with Erysimum. |