Asia-Tropical: Borneo present; New Guinea present; Sumatera (Sumatera present)
Malesia: Sumatra, Borneo, New Guinea.
There is variability in Sumatran specimens in abundance of glands or capitate hairs on lower surface of pinnae; a specimen from W. New Guinea is very like the type. Specimens from eastern New Guinea have rather few glands and capitate hairs. The type of D. supravillosa is small (lamina 20 cm long) and has capitate hairs between veins on lower surface.