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

Bundles of 5

needles=soft, flexible;  bark=dark furrowed
◼︎ eastern white pine  Pinus strobus

🗻︎ mountainous western 🇨🇦 Canada and 🇺🇸 USA
◼︎ whitebark pine  Pinus albicaulis

Bundles of 3 (some 2)

needles=long (13-20 cm) (5-8 in), not twisted
ponderosa pine  Pinus ponderosa

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.)

Part of 🌲︎ cedar / fir / hemlock / larch / pine / spruce  family Pinaceae in 🌲︎ conifer  order Pinales.   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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