This collection of Ficus palungensis from Gunung Palung was originally described in (1998) by Laman & Weiblen as Ficus paracamptophylla. Later they decided that it was a new species of ficus based on the following differences
“Similar to F. paracamptophylla in having elongated, persistent stipules. Differs in having narrow leaves with indistinct venation and smaller figs”.
However subsequently Berg in his Flora Malesiana monograph on Ficus (2005) determined this fig as Ficus acamptophylla. See label on the herbarium sheet below.
It is possible that this fig could be a hybrid between F. acamptophylla and F. paracamptophylla, which are obviously closely related or part of a variable species complex which includes all three species..
Laman & Weiblen (1998) Figs of Gng Palung NP Kalimantan