Peah, Chapter 1, Mishnah 5. In the previous mishnah we learned the rules that determine whether a given item is obligated in peah:
It must be food.
It must be something that is guarded, that the owners keep hold of in order to acquire it.
It must grow from the ground.
It must be harvested all at one time.
It must be fit for storage.
The example given at the end of that mishnah was grain and legumes.
Our mishnah: fruits of the tree that are obligated in peah:
Our mishnah opens by listing the fruits of the tree that are included in the obligation: "Ha'og v'hecharuvin v'ha'egozim v'hashkedim v'hagefanim v'harimonim v'hazeisim v'hatemarim chayavin b'peah".
"Ha'og" - usually translated as sumac. This substance was used in the process of tanning hides, and even so it was apparently fit to eat.
"V'hecharuvin" - carobs, known to many as 'bokser'.
"V'ha'egozim v'hashkedim" - walnuts and almonds.
"V'hagefanim" - grapes.
"V'harimonim v'hazeisim v'hatemarim" - pomegranates, olives and dates.
All of these are obligated in peah. Figs, by contrast, are not counted in the list. The reason for this is learned from the rule in the previous mishnah: they are not gathered all at one time, but rather a little at a time.
To summarize: This mishnah lists the fruits of the tree that are obligated in peah - sumac, carobs, walnuts, almonds, grapes, pomegranates, olives and dates - and excludes figs, which are not gathered all at one time.