Black Cottonwood, Western Balsam Poplar, California Poplar
native to western North America
First tree species ever to be genome sequenced
The buds are aromic
Male and female catkins are on seperate trees (dioecious)
Pistillate catkins are 8 to 20 cm long
with rotund-ovate, three carpellate subsessile fruits 5 to 8 mm long.
Each capsule contains many minute seeds with long, white cottony hairs.
Staminate catkins contain 30 to 60 stamens, elongate to 2 to 3 cm
CottonWood
2007.04.15
Horseshoe Lake
