quacking aspen populus tremuloides during fall. 3 b 2009

2009 america american aspen bark botany branches clone cold colony conservation deciduous dioecious during elevation environment fall female fire forest golden grove habitat high leaves male mantila michx national nature north northern outdoors pattern photographed poplar popple populus quacking regeneration rhizomatic sal species states tree trembling tremuloides trunks united utah vegetative white willow winter wood