 The sycamore may hybridise with other species in Acer section Acer , including with A. heldreichii where their natural ranges overlap and with <unk> <unk> hybrids with A. <unk> ( Acer section <unk> ) are also known , in which the basal lobes of the leaf are reduced in size , making the leaves appear almost three @-@ lobed ( <unk> ) . 
