Needles are arranged in bundles of  5   3 3 (some 2) 2 (some 3) 2 :

Bundles of 3

needles=very long (20-45 cm) (8-18 in), slender, ragged sheath
longleaf pine Pinus palustris

needles=       long (15-23 cm) (6-9 in), slender, stiff
loblolly pine Pinus taeda

needles=       short (<13 cm) (<5 in), yellow-green, twisted, may occur on branches and trunk
pitch pine Pinus rigida

Bundles of 2 (some 3)

needles=long (8-13 cm) (3-5 in), slender;  twig=whitish
shortleaf pine Pinus echinata

Learn more about pines genus Pinus (Pinus spp.)

Invasive > Global

Uses by native peoples
(Ethnobotany database)
Pinus hosts caterpillars of 247 species
of butterflies and moths, in some areas.

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