Asia-Tropical: Borneo present (Sarawak present), S. Sumatra present
Malesia: S. Sumatra and Borneo (Sarawak).
Part of the above description is based on a plant from Gunong Mulu in Sarawak cultivated at Kew. This shows the abundance of glands of a distinctive shape on the lower surface of pinnae and on indusia. The glands on a dried specimen from the same locality are so shrivelled as to be hardly distinguishable.