Prerequisite: have an Intelligence of at least 16.

Being a dendrophile is amazing and you can't ever have enough of them (even when 99% of the multiverse is trees) so we love trees and we will NEVER do anything to hurt trees (because they are amazing) and also they help all species far and wide because they make oxygen (Ignore the fact that constructs, undead, elementals, and devils, demons, and angels don't need to breath but trees still are amazing) and trees do many other good thins.

Knowing your trees: trees are so wonderful (and you better agree with me) and you just have to know about them so you can identify 10 trees of your choice without having to do a nature check or any check that you have to do to identify trees.

Trees equal nature: everyone knows that trees are a key part of nature so you get a +1 in Intelligence (nature) checks

Food safe or not: trees are tasty but sometimes they aren't (for some odd reason) so you need to know when they aren't so you get an advantage on all checks that find out if the tree grows safe to eat food or how to make that food safe (If possible).

Fire burns trees (help): fire is scary because they burn down trees (and it hurts other things but we like trees) so when you first see fire you have to make a strength saving throw (D20+str modifier) and if you roll a 10 or lower you frightened for 5 rounds.