To investigate the sex differences of Broussonetia papyrifera( L.) Vent.,the main anatomical characteristics of the female and male plant leaves were observed and compared using paraffin sectioning.( 1) Leaf epidermis,mesophyll,and vein anatomical structures of the female and male plants were compared. Common features showed there was only one layer of cells on the upper and lower epidermis,with thick cuticles and rich trichomes,and the palisade tissue was highly developed in the mesophyll; furthermore,the ...