robinia

They fold up when light is too strong, as in Robinia; it produces the same effect as want of light.

A Pea-blossom is a typical example; the present illustration is from a species of Locust, Robinia hispida.

Diagram of papilionaceous flower (Robinia, Fig. 261), with bract below; axis of inflorescence above.

The leaves of barberry and of some species of Astragalus, and the stipules of the false acacia (Robinia) are spiny.

Robinia hispida, sometimes called Rose Acacia, is a native species of the Locust.