Shulchan Arukh, Orach Chayim 501/שולחן ערוך·אורח חיים תק״א

2Wood that is somewhat large but suitable for kindling without splitting, one should not split it at all, and even breaking it by hand, there are those who forbid.

3We do not bring wood from the field, even if it was gathered there from the eve of the holiday. However, one may gather in the field from what is directly before him (and likewise in a courtyard, one takes from before him) [Beit Yosef and Rambam] and kindle there. And one may bring wood from what is gathered in a private domain, even if it was enclosed not for dwelling purposes, provided that it has a doorframe and is within the Shabbat boundary. If it lacks any one of these conditions, the wood is muktzeh.

4Reed leaves and vine leaves—even though they are gathered in an enclosure, since the wind scatters them, they are considered as if scattered and are forbidden. But if one placed a heavy vessel upon them before Yom Tov, they are considered prepared.

5Wood that fell from a tree on Yom Tov—one may not use it for kindling. (See further above, section 506, paragraph 2.)

6Vessels that broke on Yom Tov may not be used for kindling because they are newly designated. (And if one kindled with vessels, it is forbidden to stir the fire after they have been partially ignited, for then they become broken vessel pieces, unless one has added prepared wood to them) [Maggid chapter 2 and Ran, first chapter of Beitzah]. But one may kindle with whole vessels or with vessels that broke while it was still day.

7Almonds and nuts that one ate before Yom Tov—one may kindle with their shells on Yom Tov. But if one ate them on Yom Tov, one may not kindle with their shells. Gloss: Also, one should not kindle with the almonds and nuts themselves unless they are still in their shells (Beit Yosef). And torches that remained from the first Yom Tov that went out—it is permitted to relight them even on the second day of Rosh Hashanah or on Yom Tov following Shabbat [Rosh and Mordechai, beginning of Beitzah, and Beit Yosef].