Botany
A medium-sized tree, the leaves in whorls of three, oblong-obovate, 10 to 30 cm long, 5 to 7 cm wide, pointede at both ends, and shot-stalked. Flowers are small, yellowish-white, on short, terminal cymes. Calyx is small, the corolla tubular, 1 to 1.5 cm long, lobed towards the top. Fruit is a double follicle, pendant, long and slender, 20 to 40 cm long. Seeds are small and flat, with deep-brown hairs.

Distribution
In open forests and thickets at low and medium altitudes throughout the Philippines.

Chemical constituents and properties
The bark yields four alkaloids: macralstonine, macralstonidine, villalstonine and a base M.
Febrifuge, tonic, aphrodisiac, emmenagogue, vulnerary.

Constituents
Total alkaloids 0.99% - macrophylline, macrastonine, macalstonidine, villastonine, monomeric indole alkaloids, dimethoxy alstophylline.

Parts used and preparation
Fresh leaves, bark.

Folkloric uses
Crush leaves, mix with a little coconut oil, warm and apply on affected area applied to sprains, bruises and contusions.
The bark, in powder, decoction, tincture, or infusion is used a febrifuge, tonic, aphrodisiac, antidysentery, emmenagogue, anticholeric and vulnerary.

Availability
Wild-crafted.