loblolly pine

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A pine (Pinus taeda) of the southeast United States, having needles in fascicles of three, oblong cones, and strong wood used as lumber and for paper pulp.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun countable A pine tree, Pinus taeda, native to the southeastern US and extensively planted.
• noun uncountable The wood of Pinus taeda.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun tall spreading three-needled pine of southeastern United States having reddish-brown fissured bark and a full bushy upper head