long·leaf pine (lông'lēf', lŏng'-) n. An evergreen tree (Pinus palustris) of the southeast United States, having long needles and heavy, tough, resinous wood valued as a source of timber, pulp, and turpentine. Also called yellow pine; also called regionally fat pine.
short·leaf pine (shôrt'lēf') n. A pine tree (Pinus echinata) common in the southeast United States, having dark bluish-green leaves grouped in fascicles of two. Also called yellow pine.