Found cluster of black cottonwoods at the eastern end of the boardwalk. Their fallen leaves have blanketed much of the surrounding ground.
very tall tree - can grow to be 175 ft tall
long, branch-free trunks
large, broad heart-shaped leaves
The bark is grey and becoming thick and deeply fissured. The stem is grey. This large tree has the lower branches drooping downwards. The leaves are long with a glossy dark green upper side and light grey-green underside.
symmetrical, triangular shaped leaves
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.