You can weave small leaves, too -- old photo, newly edited for a project
Here's another tree made from weaving leaves. This one uses 8 small leaves woven into a circle, and then I stuck on another layer (using the studs) to make it longer. I don't have a lot of these pieces, but I have ordered more (for my Mother's Day present). It will be fun to experiment more with them.
There's a 1x3 green brick at the top of the trunk, on the inside of the tree. Then I draped the completed leaf circle over that, and then attached another small leaf to the top by using a couple round 1x1 plates to attach it to the 1x3 green brick. I'm sure there's a more elegant way to do it, but it worked well enough, I guess.