Pinus echinata is a species of pine native to the eastern United States from southern New York south to northern Florida, west to the extreme southeast of Kansas, 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 metres with a trunk diameter of 0.5–0.9 metres. The leaves are needle-like, in bundles of two and three mixed together, and from 7–11 centimetres long. The cones are 4–7 centimetres long, with thin scales with a transverse keel and a short prickle. They open at maturity but are persistent. Shortleaf pine seedlings develop a persistent J-shaped crook near the ground surface. Axillary and other buds form near the crook and initiate growth if the upper stem is killed by fire or is severed. 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 "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. This pine occupies a variety of habitats from rocky uplands to wet flood plains.

Economic importance of Pinus echinata

it looks like a 3D spruce created on the basis of the needles of the original, which added a triple trunk only.

spruce 3D looks like other conifers.