Images depicting common differences in tree morphology between C3′H-RNAi and wild-type hybrid poplar. A, Comparison of wild-type (left) and C3′H-RNAi (right) height growth. B, Leaf morphology and axial shooting of C3′H-RNAi poplar. C, Root biomass and architecture of wild-type poplar. D, Root biomass and architecture of C3′H-RNAi poplar. E, Leaf morphology of wild-type poplar.