Leaves alternate, deciduous, oval, margins finely round. Spade shaped with serrated edges.
Black Cottonwoods are common at UBNA and they are easy to identify.
has different color on each size of the leaf. leaf looks like a round arrowhead
Spade like leaves with a gray bark and catkin remnants.
Black cotton wood leave on the brink of decomposing.
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.