trunk is part of:
   100%  palm-tree
    80%  tree
    24%  plant  (indirectly)
    12%  flower  (indirectly)

trunk contains:

Full expansion for trunk:
   100%  1x1 Palm Tree Trunk Segment
   100%  2x2 Palm Tree Trunk Base
   100%  4x4 Round Tree Stump
    10%  1x1 Nozzle/Palm Tree Trunk Segment