Cartoon plants:
Low Ploy: Palm and Trees range from about 500 tris and some of them reach about 1000 tris Small plants range from about 80 tris and some of them reach about 800 tris
You can get the fbx files with textures or project files for Unreal or Unity from here:
https://gumroad.com/nyagolov
Cartoon Oasis Plants Video - Unreal 4
Cartoon Oasis Plants