that … is very smooth (ignore mature trees lowest parts) or
has shallow vertical fissures or ribs or has deep vertical fissures or ribs or has interlacing ridges (like tire tread) or
separates into features that hang away from the trunk :
many colors, each in own asymmetric patchesAmerican sycamore Platanus occidentalis
two-color (gray with lots of lenticels); huge leaf scars thickly C-shaped, filled by large budtree of heaven Ailanthus altissima
one-color (light gray), muscular ribsAmerican hornbeam / ironwood Carpinus caroliniana one-color (light gray), no muscular ribs, often w/carved graffitiAmerican beech Fagus grandifolia
one-color (red or cinnamon), may peel away in thin sheets revealing green cambiumPacific madrone Arbutus menziesii
🚧 under constructioneastern cottonwood Populus deltoides 🚧 under constructionbig-toothed aspen Populus grandidentata 🚧 under construction♒︎ swamp cottonwood Populus heterophylla 🚧 under constructionquaking aspen Populus tremuloides
very thick vertical ribs, looks covered with warts or puffy painthackberry Celtis occidentalis 🚧 under construction◼ black willow Salix nigra
🚧 under constructionpignut hickory Carya glabra 🚧 under constructionsassafras Sassafras albidum
bark=thin layers, rolling around trunk in horizontal strips, white over orange◼ American white birch Betula papyrifera
bark=covered in burnt potato chips/crispsmature 🍒︎ black cherry Prunus serotina
bark=thick rigid shaggy gray vertical strips, barely attachedmature shagbark hickory Carya ovata bark=thick rigid shaggy gray vertical strips; in wild, branches and trunk have large smooth thornshoney locust Gleditsia triacanthos
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