The thornleffo evolved from the bileffo. In this stage of development, this plent created a more rigid and resistant structure, and its support in the ground keeps it from falling, even in the strongest winds. Its leaves are thicker, and now part of the twigs pierce them and form small thorns on its extremities. These thorns aren't sharp, making this plent serve as food for many herbivores of diverse sizes.
Living Relatives (click to show/hide)
None found. Note that this does not necessarily mean it has no living relatives at all, but that, assuming all taxonomy is filled in, its entire phylum is extinct; any relatives it does have likely do not resemble it.