73. Cistineae.—Rock-rose family.
354. HELIANTHEMUM, N.F.—FROSTWORT. The herb of Helian'themum canaden'se Michaux. Habitat: North America. As found in commerce it consists of broken branches or stems not longer than 1 to 1 ½ inches, mixed with a few broken roots, crushed, woolly leaves, and, occasionally, yellow petals; the stems are red-brown, thread-like, slightly pubescent, internally whitish, with a large pith; taste astringent and bitter. It contains a bitter glucoside, soluble in water, alcohol, and benzol, and 11 per cent. of tannin, with sugar and gum. Tonic, astringent, and alterative, in the treatment of scrofulous diseases. Dose: 5 to 20 gr. (0.3 to 1.3 Gm.).