Swamp Bay is a very common medium-sized tree, typical of the Coastal Plain of North Carolina. It was recently split from the similar Red Bay (Persea borbonia), which is rare in NC and found only along the immediate coastline north to Carteret County. Swamp Bay has densely pubescent twigs, unlike the glabrous (smooth) twigs of Red Bay. The leaves of both have an aroma like that of the European true laurel or bay tree, Laurus nobilis, and can be used for similar purposes. The leaves are eaten by caterpillars of the Palamedes Swallowtail (Papilio palamedes).

Persea borbonia is in grave danger from a fungus (Ophiostoma sp.) carried by the Redbay Ambrosia Beetle (Xyleborus glabratus), introduced from Asia. The redbay wilt, or laurel wilt disease, is spreading rapidly in coastal South Carolina, Georgia, and Florida. Presumably Swamp Bay (Persea palustris) will also be affected by this disease. It has been reported in Sassafras (Sassafras albidum); other members of the laurel family (Lauraceae) may be susceptible.

New Hanover Co., NC 8/27/05.

The leaves are often covered with galls.

Moore Co., NC 6/10/06.

The twigs are densely rusty-pubescent.

Moore Co., NC 6/10/06.

The flowers are small and greenish-white.

Moore Co., NC 6/10/06.

New Hanover Co., NC 8/27/05.

The drupes are dark blue-black. Swamp Bay is in the same genus as the avocado, Persea americana.

Dare Co., NC 11/3/2005.