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.
Trailing herbs or shrubs. Flowers usually capitate, yellow, white, purple, or red. Calyx tubular or inflated, including the 1- or few-seeded pod. Stamens usually monadelphous. About twenty species are known, chiefly from the countries bordering the Mediterranean Sea. The Greek name.
1. A. Barba-Jovis. Jupiter's Beard. - A tender evergreen shrub about 3 feet high with pinnate leaves and yellow flowers. A handsome silvery shrub rare in cultivation, and requiring protection in very severe weather.
2. A. Vulneraria. Woundwort. - An indigenous herbaceous trailing species. Leaves and stems clothed with silky hairs. Leaflets 3 to 7, linear-oblong. Flowers capitate, varying in colour from white and cream to purple and crimson.