See text Linaria is a genus of almost 200 species of flowering plants, one of several related groups commonly called toadflax.

They are annuals and herbaceous perennials, and the largest genus in the Antirrhineae tribe of the plantain family Plantaginaceae.

The 'toad' in toadflax may relate to the plants having historically been used to treat bubonic plague, a false link having been drawn between the words 'bubo' and 'Bufo'.

Vasicine, vasicinone, 7-hyrdoxyvasicine, linarinic acid, choline, linavuline, luteolin, acacetin, apigenin, chrysin, quercetin, myricetin, linarioside, aucubin, linaride, iridolinaroside A-D, and iridolinarin A-C are some compounds found in plants of this genus.

[5] Toadflaxes are used as food plants by the larvae of some Lepidoptera species, including the mouse moth (Amphipyra tragopoginis) and the common buckeye (Junonia coenia).