The Pulai tree is native to South China, tropical Asia and the Indian Subcontinent (India, Nepal, Sri Lanka, Pakistan, Bangladesh), and Australia (Queensland). In Indonesia, its distribution area is widespread across almost all regions. In Bali, the Pulai tree is considered sacred, so it is allowed to grow until it reaches a diameter of 200 cm. It possesses various health benefits and economic value as a raw material for industry.

It grows in regions with an altitude of 1–1,230 meters above sea level (m.a.s.l.), annual rainfall of 1,000–3,800 mm/year, and areas that are not waterlogged.

• Root (Akar) Taproot, possessing porous lenticels on its surface.

• Stem (Batang) The bark is light brown, and there is milky white sap (latex) on the inner part of the bark.

• Leaves (Daun) Oval, spatulate (spoon-shaped), the leaf tip is pointed (acuminate), shiny green with the underside of the leaf being paler.

• Flower (Bunga) Bisexual, compound, clustered at the leaf tips, the calyx is ovate, yellowish-white.

• Fruit (Buah) Ribbon-shaped (follicles), white color, 20–50 mm long.

• Seed (Biji) Oblong, hairy, small size, white, with a length of 1.5–2 cm.

• Propagation is done generatively (seeds) and vegetatively (stem cuttings and shoot cuttings).

Treats sore throat, worm infections (anthelmintic), reduces fever, treats purulent ulcers, wounds, aids in blood cleansing for mothers after childbirth (postpartum), remedy for syphilis, kidney stones, toxoplasmosis, and is an aphrodisiac. It has antimalarial, antidiarrheal, anticancer, and antioxidant activities.

Tannins, glycosides, triterpenoids, flavonoids, and phenols.

Bark: Alkaloids (echitenine, ditamine, ditaine, alstonine, reserpine, tetrahydroalstonine, alstonidine, yohimbine).