There are different versions of a similar tree in this package...after getting advice on them on the PureZC forums the went through several iterations and different stages of the tree may suit you better depending on your taste.

The original has more of a side scrolling perspective and has it's own trunk to go with it.

The other two are two takes on an overhead perspective, one more overhead than the other, both may work for you. I included two trunks for it, one that is twisty (which I prefer) and one that uses a modified dead tree (this was suggested by Sheik) which also works really well.

Finally, I made some merged tree tiles, so that if you use them next to each other the treetops blend in to one another.

(You may not want to use so many all in one screen as I do in my example shot...)

The package was exported in DoR cset 3.

The original rip was from RPG Maker and can be found numerous places online.
Thanks to many people who gave me feedback on the PureZC forums.