Figure 4 from: Harris AJ, Chen Y, Olsen RT, Lutz S, Wen J (2017) On merging Acer sections Rubra and Hyptiocarpa: Molecular and morphological evidence. PhytoKeys 86: 9-42. https://doi.org/10.3897/phytokeys.86.13532

Figure 4 - 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.