Allamanda, also known as Yellow Bell, Golden Trumpet or Buttercup Flower, is a genus of tropical shrubs or vines belonging to the dogbane family (Apocynaceae).
The genus Allamanda is native to South and Central America. Their year-round production of large, bright flowers have made the Allamanda popular ornamentals.
A woody, evergreen shrub with vigorous growth, Allamanda may reach a free-standing height of 2 metres or more. The leathery leaves are lancelike, pointed, and may either be opposite or in whorls of three or four. The yellow, trumpet-shaped flowers are 5-7.5 centimetres in diameter; cultivated forms tend towards larger blooms which may also be white, purple, pink or orange in colour. Their scent may be described as delicate and fruity.