Melis'sa officina'lis, Melissa, Balm.--The leaves and tops, U.S.P. 1840-1890; sia Minor, S. Europe. Perennial herb with fragrance of lemons, growing in waste places; stems several, quadrangular, .3-1 M. (1-3 degrees) high, branched at base, pubescent; flowers yellowish-white, purplish, calyx 5-toothed, tubular, bell-shaped; corolla cilabiate, 4 stamens. Leaves, 5 Cm. (2') long, petiolate, ovate, obtuse, crenate, hairy, glandular, branches square; fragrant, aromatic, astringent, bitter; contains volatile oil .25 p.c., bitter principle, tannin, gum; solvents: diluted alcohol, boiling water. Carminative, diaphoretic, stimulant, antispasmodic; used as a refreshing drink; when cold for febrile affections, when hot acts slightly on the skin. Dose, gr. 15-60 (1-4 Gm.); water (Aqua Melissae), leaves (1) distilled with water (10); compound spirit (Spiritus Melisse Compositus), balm 14 + lemon peel 12, nutmeg 6, cinnamon 3, clove 3, alcohol 150, water 250, distil 200 parts; fluidextract, mxv-60 (1-4 cc.); infusion, 3j-2 (30-60 cc.); oil, mj-2 (.06-.13 cc.).