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Circular 1445: Fire in the Wildland-Urban Interface: Selecting and Maintaining Firewise Plants for Landscaping

Figure 3. Many southern pines, such as longleaf pine (b), are good self-pruners, and their lower trunks are devoid of any branches. Sand pines (c), which do not self-prune, often have branches close to the ground that make them more likely to burn during a wildfire.

Credit: William D. Boyer, USDA Forest Service, www.forestryimages.org