rcantor,
My understanding regarding the persistence of the Caprifig tells me that, to exist. it must be a very special fruit. Throughout many years, have seen and confirmed the symbiotic relationship between the insect and the Caprifig... if for whatever reason, climate extremes for instance, in a given season, wasps fail to enter any of the 3 crops, all figs of that crop will rapidly soften, turn yellow and fall to the ground.
Eisen spoke of insectiferous and polleniferous Caprifigs on the same tree
Polleniferous being those Profichi figs with no galls (wasps) but with plenty of male flowers (pollen).
In a sense these polleniferous Caprifigs seem to respond to your definition of persistence (?).. however I have never seen such fig.
Have on some years taken Profichi figs from a remote wild tree exiting wasps rather late.
These are large Caprifigs with not many wasps, and with sweet edible flesh and skin.
Contrary to the average Caprifig (dry insides) this one looks rather juicy.
It helps to pollinate late varieties like Beb.Branca , Black Bourjassote, ,,etc
here the pictures of this late Profichi
Francisco
Portugal