Four genera and 91 species, all natives of southeast Asia, Australia and Oceania. They are evergreens that resemble conifers but are not. Casuarina trees are widely used for timber and windbreaks. The name "casuarina" is related to the Malay name for "cassowary"; evidently there is some resemblance between the trees and the birds. Above, the very distinctive desert oaks (Allocasuarina decaisneana) of the Australian outback, looking like longleaf pines.
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