Flexi Says: Palm tree have few similarities with grasses and there is some point of debate of them being a tree or a grass. Palms are monocots just like grasses. Grasses belong to Poaceae family and Palms belong to Arecaceae family. Both have parallel venation in leaves. Palm trees do not have bark or woody tissue like other trees. These are the reasons that it might be recognized as a grass and not a tree.