Asia-Tropical, Christmas I present, India to southern China and northern Indochina present, Indian Ocean present, continental Asia present
Continental Asia: India to southern China and northern Indochina, Indian Ocean: Christmas I Throughout Malesia.
This species is very variable especially in the leaf base which can be long-decurrent and not leaving a stipe, or a (long) stipe may be present. Small fronds generally have a venation with the veins forked near the costa; this venation may occur apically in larger fronds. Leptochilus trifidus Alderw. probably is a hybrid between L. decurrens and L. macrophyllus.
W.C. Shieh et al. - in Fl. Taiwan, ed. 2. 1994: 494
Copel. - in Fern Fl. Philipp. 1960: 488
Backer & Posth., Varenfl. Java. 1939: 231
Nakaike, Enum. Pterid. Jap. Filic. 1975: 339
C. Chr. - in Contr. U.S. Nat. Herb. 1931: 325
Noot. - in Blumea. 1997: 279
Holttum - in Revis. Fl. Malaya. 1954: 164