Thespesia populnea, commonly known as the Portia Tree. The Portia tree reaches a height of 6–10 m (20–33 ft) tall and its trunk can measure up to 20–30 cm (7.9–11.8 in) in diameter.It grows at elevations from sea level to 275 m (902 ft) in areas that receive 500–1,600 mm (20–63 in) of annual rainfall.

The Portia tree is able to grow in the wide range of soil types that may be present in coastal environments, including soils derived from quartz (sand), limestone, and basalt; it favours neutral soils (pH of 6–7.4). Pollen grains are approximately 70 microns in diameter.