PHYSICAL QUALITIES: Weight, medium (32nd in this list); 32 lbs. per cu. ft.; sp. gr., 0.6104; very strong (18th in this list); very elastic (8th in this list); soft (38th in this list); shrinkage, 4 per cent.; warps little; durable; troublesome to work; likely to split along annual rings in nailing. COMMON USES: Heavy construction, railroad ties, house trim, ship building, cars, docks, bridges. REMARKS: Wood hardly distinguishable from long-leaf pine. Often forms pure forests. The most desirable yellow pine, much less resinous and more easily worked than others. [Illustration: Radial Section, life size.] [Illustration: Cross-section, magnified 37-1/2 diameters.] [Illustration: Tangential Section, life size.] 8 LOBLOLLY PINE. OLD FIELD PINE. _Loblolly_ may refer to the inferiority of the wood; old field refers to habit of spontaneous growth on old fields. _Pinus taeda_ Linnaeus. _Pinus_, the classical Latin name; _taeda_, the classical Latin name for pitch-pine, which was used for torches. [Illustration: Habitat.] HABITAT: (See map); grows best in eastern Virginia, and eastern North Carolina. [Illustration: Leaf.] CHARACTERISTICS OF THE TREE: Height, 100'-150'; diameter, often 4'-5'; branches high; bark, purplish brown, shallow, meandering fissures, broad, flat, scaly ridges; leaves, 3 in sheath, 4"-7" long; cones 3"-5" long. APPEARANCE OF WOOD: Color, heart-wood orange, sap-wood lighter; non-porous; rings very plain, sharp contrast between spring wood and summer wood; grain, straight, coarse; rays conspicuous; very resinous, but ducts few and small. PHYSICAL QUALITIES: Weight, medium (39th in this list); 33 lbs. per cu. ft.; sp. gr. 0.5441; strong (26th in this list); elastic (17th in this list); medium hard (43d in this list); shrinkage, 4 per cent.; warps little; not durable; difficult to work, brittle; splits along rings in nailing. COMMON USES: Heavy construction, beams, ship building, docks, bridges, flooring, house trim. REMARKS: Resembles Long-leaf Pine, and often sold as such. Rarely makes pure forests. [Illustration: Radial Section, life size.] [Illustration: Cross-section, magnified 37-1/2 diameters.] [Illustration: Tangential Section, life size.] 9 SLASH PINE. CUBAN PINE. _Pinus caribaea_ Morelet. _Pinus heterophylla_ (Ell.) Sudworth. _Pinus_, the classical Latin name; _caribaea_ refers to the Caribbean Islands; _heterophylla_ refers to two kinds of leaves. [Illustration: Habitat.] HABITAT: (See map); grows best in Alabama, Mississippi, and Louisiana. [Illustration: Leaf.] CHARACTERISTICS OF THE TREE: Height, sometimes 110', straight, tall, branching high; diameter 1'-3'; bark, dark red and brown, shallow irregular fissures; leaves, 2 or 3 in a sheath, 8"-12" long; cones, 4"-5" long.