Leonardo da Vinci’s sketch of a tree illustrates the principle that combined thickness is preserved at different stages of ramification. The math that describes the branching pattern of trees in ...

Trees can be identified in winter by observing their needles, bark, branching patterns, and buds. Distinctive bark, such as the smooth gray bark of a beech or the peeling white bark of a paper birch, ...

Terrestrial laser scanning data show that trees move their branches in a diurnal pattern, settling down for the night -- as if falling asleep. Changes in the water status of leaves and branches causes ...

What must you see to ID a tree? And what must you see during the winter, when a thick cover of snow sits atop leaf beds. That is what Bill Michaelek, manager and naturalist at Beaver Meadow Audubon ...

Across cities and suburbs, a curious pattern keeps turning up in aerial photos and field surveys alike: trees that stand closest to cell towers are often the ones that look the sickest. Their crowns ...