Allamanda cathartica

Allamanda cathartica, commonly called golden trumpet, common trumpetvine, and yellow allamanda, is a species of flowering plant of the genus Allamanda in the family Apocynaceae. It is native to Brazil. This plant is cited in Flora Brasiliensis by Carl Friedrich Philipp von Martius.

It does not twine, nor does it have tendrils or aerial roots. It can be pruned into a shrub form. If not pruned it can sprawl to a height of 20 feet.

The city of Canóvanas, Puerto Rico has adopted this species, known locally as canario amarillo, as its official flower.

Cultivation
The species is cultivated as a house plant. It requires a soil rich in organic matter, temperatures of not less than 18 C during the growing season, plenty of moisture, and bright light but not direct sunlight. During the rest season from October to March, the plant should be watered more sparingly and can endure temperatures down to 13 C. It should be repotted every year until it is in a container of 40 to 50 cm. Propagation is by cuttings taken from April to May.