Now that our summers are trending hotter for longer, leaning toward perennials that can tolerate heat makes sense in garden ...

Find out about common North American trees with pinnate leaves. Learn how to identify hickory, ash, walnut, black locust, and pecan using this guide.

These fibrous structures, which are derived from leaves, do a range of other jobs as well. A coating of spines can serve as shade by day or insulation by night.

Why do cacti have spines? TAMMY: Spines are a leaf adaptation and they’re perfectly designed to capture and retain the limited moisture available in desert environments.