title: Supernumerary heads in Hydra viridis.
mesh_terms: D000014:Abnormalities, Drug-Induced; D002465:Cell Movement; D003063:Cnidaria / Q000145:classification / Q000166:cytology; D003078:Colchicine; D046508:Culture Techniques; D006257:Head / Q000002:abnormalities*; D012038:Regeneration
chemical_list: D003078:Colchicine