The leaves and tops of

Melissa officinalis.

Characters. - Leaves about 2 inches (5 centimetres) long, petiolate, ovate, obtuse, crenate, somewhat hairy, glandular; branches quadrangular; flowers in about four-flowered cymules, with a tubular, bell-shaped, five-toothed calyx, a whitish or purplish two-lipped corolla, and four stamens; fragrant, aromatic, and bitterish.

Composition. - It contains a small quantity of a volatile oil.

Uses. - It has scarcely any remedial action, but is used in the form of warm infusion or tea as a diaphoretic in slight febrile conditions.