Pandanus is a large genus of between 600-700 species of tree- or shrub-like flowering plants in the family Pandanaceae. The genus is native to the Old World tropics and western Pacific Ocean islands, with the largest number of species in Madagascar and Malesia (Wagner, Herbst, & Sohmer 1990). They are typically found in lower forested areas, savanahs, and along wetter shoreline regions. They are sometimes called screwpines because their long, flat leaves grow in a spiral pattern.

They vary in size from small shrubs less than 1 m tall, up to medium-sized trees 20 m tall, typically with a broad canopy and moderate growth rate. The trunk is stout, wide-branching, and ringed with many leaf scars. They commonly have many thick prop roots near the base, which provide support as the tree grows top-heavy with leaves, fruit, and branches. The leaves are strap-shaped, varying between species from 30 cm up to 2 m or more long, and from 1.5 cm up to 10 cm broad.

They are dioecious, with male and female flowers produced on different plants. The flowers of the male tree are 2-3 cm long and fragrant, surrounded by narrow, white bracts. The female tree produces flowers with round fruits that are also bract-surrounded. The fruits are globose, 10 to 20 cm in diameter, and have many prism-like sections, resembling the fruit of the pineapple. Typically, the fruit changes from green to bright orange or red as it matures.

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