Calen'dula officina'lis, Calendula, Marigold, N.F. -- The dried ligulate-florets with not more than 2 p.c. of foreign organic matter; S. Europe, Levant, cultivated as ornament (flowers). Annual herb .3-.6 M. (1-2 degrees) high, roughish-hairy; leaves toothed, oblanceolate; flower-heads terminal, 5 Cm. (2') broad, involucre hemispherical, 2-rowed; disk-florets tubular, 5-cleft, yellow. Ligulate (ray) florets 15-25 Mm. (3/5-1') long, 3-6 Mm. (1/8-1/4') broad, yellowish, 1-3-toothed, short-hairy tube occasionally enclosing remnant of filiform style and bifid stigma; odor slight, somewhat heavy; taste slightly bitter, faintly saline. Powder, yellowish -- few non-glandular hairs, double row of thin-walled cells; elongated epidermal wavy-walled cells with chromoplasts and oil-like globules; pollen grains with spinose projections, 3-pored; tracheae; calcium oxalate rosettes or prisms; solvents: alcohol, boiling water partially; contains volatile oil, bitter principle, calendulin (analagous to bassorin), fat, resin, sugar, gum ash 8-11 p.c. Stimulant, tonic, febrifuge, anthelmintic, resolvent; jaundice, amenorrhea, scrofula, low fevers, vomiting; cancer, ulcers, wounds, otitis -- Homeopathic remedy instead of tincture of arnica or myrrh. Dose, gr. 15-60 (1-4 Gm.); 1. Fluidextractum Calendulae (67 p.c. alcohol), dose, mxv-60 (1-4 cc.); 2. Tinctura Calendulae, 20 p.c. (alcohol), dose, 3ss-2 (2-8 cc.).