The genus is native to the Old World, with the species concentrated around the equatorial regions - eastern and southeastern Asia including the Philippines with 10 species (9 of which are endemic), eastern Africa (including Madagascar), northern Australia, Polynesia, and Micronesia.
O xénero é nativo do Vello Mundo, coas especies concentradas arredor das rexións ecuatoriais do leste e sueste de Asia, incluíndo as Filipinas con 10 especies (9 das cales son endémicas), leste de África (incluíndo Madagascar), norte de Australia, Polinesia, e Micronesia.