A scar left behind after the dropping of a northern Catalpa leaf (Catalpa speciosa). The letting go is controlled by chemistry in the tiny abscission zone, a narrow band of cells at the base of ...

The leaf scars, located beneath the buds, of Butternut Hickory look like monkey faces with hairy eyebrows according to tree experts. Photo by Jeff Tome It's easy to appreciate the beauty of a tree, ...

At the point where the stem of the leaf is attached to the tree, a special layer of cells develops and gradually severs the tissues that support the leaf. At the same time, the tree seals the cut, so ...

Twigs and buds: Glabrous; stout; reddish-brown; have prominent horse-shoe-shaped leaf scars; series of bundle-scars around margin of leaf scar. Fruit: Green husk covered in spikes; nut and husk are ...