macro photo of poplar tree bark, with a variety of textures and lichen, in trevor, wisconsin

candelariella environment background dendrology horizontal candelaria cottonwood wisconsin wallpaper punctelia goldspeck vitellina deltoides textures lighting outdoors speckled bolliana crustose hammered parmelia concolor variety america texture peeling eastern sulcata foliose cracked populus poplar lichen trevor nature summer united states shield common candle yellow macro close trunk flame brown green black white tree bark side usa tan