Palm Blueprint

There are 3 types of trunks:

You can paint palms on the terrain using the Foliage tool. You can do this using the Actor Foliage “AF_Palm_Foliage” (.../Models/Foliage):

Random Category

If you want to have random the parameters for one or multiple Palm Blueprints, you can use the "Randomize" checkbox after you check the options from “Advanced” section:

Randomize multiple Palm Blueprints: