Shortleaf Pine (Pinus echinata) is a species of pine native to the eastern United States from southernmost New York State, south to northern Florida, west to eastern Oklahoma, and southwest to eastern Texas. The tree is variable in form, sometimes straight, sometimes crooked, with an irregular crown. This tree reaches heights of 20–30 meters (65–100 ft) with a trunk diameter of 0.5–0.9 meters (1 ft 8 in–2 ft 11 in). This pine is a source of wood pulp, plywood veneer, and lumber for a variety of uses. The shortleaf pine is one of the southern US “southern yellow pines; it is also occasionally called southern yellow pine or the shortstraw pine. Shortleaf pine has the largest range of the southern US yellow pines.
Slash Pine (Pinus elliotti) is a pine tree native to the southeastern United States. Slash pine is named after the “slashes” – swampy ground overgrown with trees and bushes – that constitute its habitat. This tree is fast-growing, but not very long-lived by pine standards (to 200 years). It reaches heights of 18–30 m (59–98 ft) with a trunk diameter of 0.6–0.8 m (2.0–2.6 ft). The leaves are needle-like, very slender, in clusters of two or three, and are 18–24 cm (7.1–9.4 in) long. The cones are glossy red-brown, 5–15 cm (2.0–5.9 in) in length with a short (2–3 mm or 0.079–0.118 in), thick prickle on each scale. It is known for its conical shape.
Longleaf Pine (Pinus palustris) is a pine native to the Southeastern United States, found along the coastal plain from East Texas to southern Maryland, extending into northern and central Florida. It reaches a height of 30–35 m (98–115 ft) and a diameter of 0.7 m (28 in). In the past, before extensive logging, they reportedly grew to 47 m (154 ft) with a diameter of 1.2 m (47 in). The tree is a cultural symbol of the Southern United States, being the official state tree of Alabama and the unofficial state tree of North Carolina.
Loblolly Pine (Pinus taeda) is one of several pines native to the Southeastern United States, from central Texas east to Florida, and north to Delaware and southern New Jersey. The wood industry classifies the species as a southern yellow pine. U.S. Forest Service surveys found that loblolly pine is the second-most common species of tree in the United States, after red maple. For its timber, the pine species is regarded as the most commercially important tree in Southeastern US