Micrographs of the leaf surfaces of Acer saccharinum. A Adaxial surface showing cell shape and organization (Norton 69) B Adaxial surface showing cuticle (Richardson & Robertson 915) C Abaxial surface showing cell shape and organization of cells and stomata (Brown 8023) D Abaxial surface showing cuticular wax (Coville s.n.). All leaf materials are from specimens deposited at US, and parenthetical information in this legend refers to the collector name and number.