This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
Tall erect perennial herbs. Leaves imparipin-nate, leaflets entire; stipules semi-sagittate. Flowers white or blue, in terminal and axillary racemes. Stamens monadelphous. Style smooth. Legume linear, terete, continuous within. There are three species, from the South of Europe and Western Asia. The name is from milk, on account of the herbage being supposed to increase the milk of goats, etc, and hence the English name of Goat's Rue.
1. G. orientalis (fig. 69). - About a yard high, with blue flowers appearing in July. Caucasus, etc.
Fig. 69. Galega orientalis. (1/4 nat. size.)
G. officinalis grows about 4 or even 5 feet high, with lanceolate acute leaflets and pale blue or white flowers. G. biloba has the leaves bifid at the tip and pale purple flowers, and G. Persica has oval or oblong mucronate glaucescent leaves and white flowers.