Phylum:
Angiosperm
Class:
Monocotyledon
Order:
Pandanales
Family:
Cyclanthaceae
12 genera, 230 species
Family:
Pandanaceae
5 genera, 982 species
Family:
Stemonaceae
4 genera, 37 species
Family:
Triuridaceae
5 genera, 55 species
Family:
Velloziaceae
5 genera, 306 species
Description:
Pandanales are highly diverse including large arboraceous plants of tropical rainforests and coastal areas, climbing vines and lianas, as well as very small achlorophyllous (mycoheterotrophic) and saprophytic herbaceous forest floor species. This has made it difficult to reliably define synapomorphies, but the loss of trimery distinguishes many of them from other lilioid monocots.
The Pandanales order is distinctive with its highly variable and hardly definable floral morphology, especially the number of stamens and their structure as well as many other characteristics. In some of the members, different interpretations exist regarding the composition and organization of the reproductive structures.
Habitat:
Range:
The order contains members mainly distributed in all the tropical and subtropical regions of the world, both New and Old World (including Africa, South America, Australia and Asia). Also, a species is present in China.