The fresh, flowering herb of Calendula officinalis.

Characters. - Stem somewhat angular, rough; leaves alternate, thickish, hairy, spatulate or oblanceolate, slightly toothed, the upper ones sessile; flower-heads nearlytwo inches (5 centimetres) broad, the yellow strap-shaped ray-florets in one or several rows, fertile, the achenes incurved and muricate; odour slightly narcotic; taste bitter and saline.

Composition. - It contains a bitter principle and calendulin. Its physiological action is not well understood.

Preparation. Tinctura Calendulae (used externally).

Uses. - It is used as an application to sprains and bruises, in somewhat the same way as arnica.