Figure 3 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 3 - Micrographs of the leaf surfaces of Acer rubrum. A Adaxial surface showing cell shape and organization (Thieret 22942) B Adaxial surface showing cuticle (Harris 2016-63) C, Abaxial surface showing cell shape and organization of cells and stomata (Stevens 2617) D Abaxial surface showing cuticular wax (Thieret 22942). All leaf materials are from specimens deposited at US, and parenthetical information in this legend refers to the collector name and number for the source specimen.