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.
A considerable genus of trees and shrubs. Leaves digitately compound or simple. Inflorescence terminal or axillary, paniculate or cymose. Calyx 5-toothed. Corolla salver-sliaped; limb oblique, 5- or 6-lobed, obscurely 2-lipped. Fruit dry, 4-celled. The majority of the species are tropical, a few reaching the Mediterranean Sea and China. A classical name applied to a Willow, or some other shrub with flexible branches.
1. V. Agnus-Castus. Chaste-tree. - An aromatic shrub 6 to 12 feet high. Leaves digitately 5- to 7-foliolate; leaflets lanceolate-acuminate, quite entire, and clothed with a white tomentum on the lower surface. Flowers small, violet, in terminal interrupted paniculate spikes. A native of the South of Europe.