Sycamore has a tree-like body made of wood. His hands and feet have root-like appendages which can extend in length to attack and contain opponents. His body is giantic in size. However his appendages can be severed, incapacitating him with pain.
He competed with other mutants for the vacant spot of X-Force/X-Statix. He reportedly had a decent record of victories, but lost fingers (and a fight) to the ant-like Mant.