populus trichocarpa leaf - san bernardino mtns - 061122

angiosperms eudicots rosids malpighiales salicaceae willow family black cottonwood western balsam poplar california populus trichocarpa wild perennial tree deciduous monoclinous green gray stems twigs leaf acute rounded ovate crenate foliage botanical biology conservation vegetation tranquility bernardino mountains national forest transverse ranges riparian chaparral ecosystem nature indigenous native plants peaceful environment biodiversity botany natural beauty springtime flora scenic hiking