Ficus copiosa  is a common small tree of secondary forest, forest edge and  small islands  which probably evolved in New Guinea.

The photo above shows two distinctive features

(1) The leaf stalks (petioles) are long and straight and very variable in length.

(2) There are hairy bands of  dark  circular glands  at both the top and bottom of the petiole whilst the center of the petiole is normally bare. This feature varies from leaf to leaf and plant to plant but  when this feature is present it makes this fig very easy to distinguish.

Until recently there were no records  west of Sulawesi, however a recent discovery of Ficus copiosa  at Kunak  on the east coast of Sabah indicates  that this fig has continued its dispersal westwards  and has already started an expansion into Borneo. Figs  evolved west of Borneo in  what is now the Himalayas and reached Borneo and New Guinea  originally from the east. Ficus copiosa  is therefore  a member of about a dozen figs  which evolved on the islands east of Borneo and have crossed back into Borneo across Wallace’s Line in reverse.

Important Note:  Both the young leaves and the ripe  female figs are edible by humans so it is entirely possible that the distribution of this fig as shown in the map below has been aided by humans.