Allamanda

Description:

They are evergreen trees, shrubs, or vines. They contain a white latex. The leaves are opposite or arranged in whorls of up to 5. The blades are generally oval and smooth-edged, and some are leathery or lightly hairy. The inflorescence is a compound cyme. The flower has five lobed sepals and a bell- or funnel-shaped corolla of five petals, yellow in most species. The fruit is a schizocarp containing two to four seeds

Habitat:

Yellow allamanda (Allamanda cathartica) prefers moist, well-drained, soils in tropical regions. At present it is mainly a weed of roadsides and nearby bushland in the wet tropics of northern Queensland, but is also reported to grow along creeks and in disturbed natural vegetation in Western Australia.