the Sage-tree, or Jerusalem Sage; a genus of the gymnospermia order, belonging to the didynamia class of plants. There are 14 species, all of which have perennial roots, and of many the stalks also are perennial. The latter rise from two to five or six feet high; and are adorned with yellow, blue, or purple flowers in whorls. They are all ornamental plants; and deserve a place in gardens, as they are sufficiently hardy to endure the ordinary winters in this climate: they require, however, a pretty warm situation. They may be propagated by offsets, or cuttings.