An erect herb up to 0.5 m high. Leaves simple, penniveined, aromatic, opposite or in whorls of up to 3, up to 60 mm long and 20 mm broad, margins serrate-crenate. Flowers axillary, solitary or sometimes in terminal or lateral leafy racemes; pedicels slender, up to 30 mm long, remaining divergent erect in the fruit; bracteoles 1.5-3 mm long, linear-lanceolate, appressed; calyx 4-7 mm long, the lobe greater than half the length of the calyx, striate in the fruit; corolla 11-18 mm long, purple with a yellow throat; stamens without an expanded connective. Capsule broadly ellipsoid, compressed, 5—6 mm long, brown. Seeds pale to dark brown, 0.25-0-4 mm long, excarunculate.

Expectorant, aniseptic and anthelminthic (plant)

PROSEA (Plant Resources of South-East Asia) Foundation
HerbNET

Limonene (leaves); perillaldehyde (leaf oil)

The sap of the leaves is used to clean wounds. A decoction of the leaves is given in fevers. The plant is used to treat menstrual problems, wounds, dysentery, fever, elephantiasis and indigestion.