This species is identifiable by its whitish to grayish bark with dark spots where the branches come out ... It is the most widely distributed tree in the United States. According to the Hardwood ...

the aspen trees should be casting a shadow. But something is wrong in this stand: the treetops are nearly bare, their branches twisting starkly into the blue sky. Sarah Tharp, a wiry biologist for ...

Aspen form individual patches comprised of numerous stems, termed ramets, each with its own trunk, branches ... (dioecious), unlike the majority of tree species, which support both male and ...