Colutea is a genus of about 28 species of deciduous flowering shrubs in the legume family Fabaceae, growing from 2–5 m tall, native to southern Europe, north Africa and southwest Asia.

Colutea arborescens, known as bladder senna—John Gerard cautioned, however, that they are not true senna, "though we have followed others in giving it to name Bastard Sena, which name is very unproper [sic] to it"—is indigenous to the Mediterranean; it has yellow flowers.

As of April 2023[update], Plants of the World Online accepted the following species:[2] Colutea arborescens, is in general cultivation in the UK.

Though in Virginia Thomas Jefferson had it and it appears in Lady Jean Skipwith's lists of plants,[4] in US gardens, it is little more than a marginal curiosity.

It is generally pest resistant, though garden snails will climb up the plant in wet weather to eat the leaves.