Here, we explore the various classifications that foresters study when identifying trees by leaf shapes. Studying leaf shape and the arrangement of leaves on a stem is the most common way of ...

Hickory trees have a leaf with less than nine leaflets and an alternate leaf arrangement. There's always a terminal leaf with three end or top leaflets that's distinctly larger than basal or ...

Everything about a leaf — from the smoothness of its surface to its vein structure and how segmented it is — is part of its function. Even trees from the same species can have very different ...

Scientists made fake leaves and dropped them in water tanks to observe how different shapes move as they sink.

One less-appreciated benefit of growing trees is for their leaves for human nutrition, but a new book, “Trees with Edible Leaves: A Global Manual,” details more than 100 species whose leaves ...

In my front yard, the brown leaves of witch hazel hang on even as the buds are preparing to open into blooms. At Lakewood Forest Preserve near Wauconda, a shingle oak tree stands in the parkway ...