Several works explore biological reactions such as burls or calluses in forms balanced between abstraction and natural references (hearts, limbs, bulbs); "Burl" (1997), "Pomme" (1998) and "Corm" (1999) incorporate a battered muffler layered with veneer, blackened steel sprouting vegetable roots, and bronze-like "tumors" that imply wounds, recuperation, and closure.