Pinus serotina, the pond pine, black bark pine, bay pine, marsh pine, or pocosin pine, is a pine tree found along the Southeastern portion of the Atlantic coastal plain of the United States, from southern New Jersey south to Florida and west to southern Alabama. Pond pine distribution may be starting to spread west towards Mississippi and Tennessee.

A pine is any conifer tree or shrub in the genus Pinus of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae.