I am making an island shaped cake with pirates/ships, sandy beaches, etc. surrounded by ocean. Can any of you tell me what I might use to make some bushes/trees for the mountains of the island? I have already made some palm trees for the beach, but need some ideas for something that looks line a dense forest with trees and bushes. Thanks for your help.

I love aine2's method of making trees found here:

I used it on small balls of fondant to make bushes on my Cars cake