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 genus of one shrubby species. Leaves abruptly pinnate. Flowers pink, rather large, umbellate, axillary, or fascicled on the old nodes. Pod stalked, very turgid, thickly coriaceous. From saline, and a tree, from the nature of its habitat.
1. H. argenteum. - Foliage usually covered with a silvery down. Leaflets few, the upper ones sometimes reduced to prickles. A very pretty shrub, especially when grafted upon the Laburnum as a standard. A native of Russian Asia.