Vitex langundi W.G.Maxwell

A shrub up to 6 m tall, leaflets (1-)3, glabrous above (except for the midrib), densely greyish puberulous below. Median leaflet oblong-elliptical to obovate, 2.5-9.5 cm x 1.5-4 cm, with 6-13 pairs of lateral veins, on a 1-6 mm long petiolule, lateral leaflets sessile or subsessile. Cymes terminal and axillary, arranged in panicles; calyx 3-5 mm long, obscurely 2-lipped, with 5 small teeth, corolla blue to purple or violet, throat villous inside. Fruit globose to ovoid, 5-6 mm long, black or bluish-black when mature. V. negundo closely resembles V. trifolia but can be distinguished by its long-petioluled median leaflet and 3-5 leaflets.

In the Philippines, V. trifolia flowers year around.

V. trifolia is found in teak forest, secondary forest and thickets up to 1100 m altitude, but also in mangrove forest and along the shore. The phenotypical variation observed between these habitats is given spesific or subspesific rank by various authors.

V. trifolia is widely cultivated not only for their medicinal properties but also as ornamental and hedge plants, and have sometimes naturalized.

Germination of V. trifolia seed is reported to be difficult.

Boundary or barrier or support: V. trifolia is often used as a hedge plant, altough it may trigger various allergic reactions (sneezing, respiratory problems, dizziness, headache, nausea) to people trimming or pruning such hedges. Ornamental: V. trifolia are widely cultivated as ornamentals.

The uses of V. trifolia are very similar to V. negundo. Medicine: A poultice of leaves is used to treat rheumatism, contusions, swollen testicles, and as a discutient in sprains. An infusion of the boiled roots is regarded as diaphoretic and diuretic, and is widely drunk in cases of fever and after childbirth. In Malaysia, various parts of the plants are considered a panacea for a wide variety of illnesses ranging from headache to tuberculosis. In Indonesia, the leaves are used in medicinal baths and a tincture or decoction of them for intestinal complaints, whereas the fruits are used as an anthelmintic. In the Bismarck Archipelago, the sap from crushed heated leaves is diluted with water and drunk to relieve headaches. In Vietnam, a decoction of dried fruits is given in the treatment of common cold, headache, watery eyes and mastitis. In Thailand, the fruits are used to treat asthmatic cough and haemorrhoids, and the root is applied in the treatment of liver diseases.