In its flora there is a strong infusion of Indo-Malayan elements.
This genus is large, and is well represented in Asia and the Indo-Malayan region.
The species are about equally divided between the Indo-Malayan region and tropical America, only one species being common to both.
Of the 176 mammals of the whole Indo-Malayan region the greater number occur in Java.
A strong infusion of Indo-Malayan types is found and a noticeable feature is the large number of flowering trees and shrubs.
They are Indo-Malayan ferns with creeping rhizomes and long-stalked, fan-shaped, forked, leathery fronds.
Indo-Malayan or Papuasian species, not extending further east or south-east.