The deeply furrowed bark of a huge old Cottonwood.
Deciduous tree that Likes to grow near water, thick spade-shaped leaves.
Growing out of a fallen tree, has terminal buds
And there was yellow and stinky sap on the buds when I touched it.
Populus trichocarpa (black cottonwood; also known as western balsam poplar or California poplar) is a deciduous broadleaf tree species native to western North America. It is used for timber, and is notable as a model organism in plant biology. Its full genome sequence was published in 2006. It is the first tree species to be sequenced.