Pinus strobus, commonly denominated the eastern white pine, northern white pine, white pine, Weymouth pine (British), and soft pine is a large pine native to eastern North America. It occurs from Newfoundland, Canada west through the Great Lakes region to southeastern Manitoba and Minnesota, United States, and south along the Appalachian Mountains and upper Piedmont to northernmost Georgia and perhaps very rarely in some of the higher elevations in northeastern Alabama. It is considered rare in Indiana.
The Native American Haudenosaunee denominated it the "Tree of Peace". It is known as the "Weymouth pine" in the United Kingdom, after Captain George Weymouth of the British Royal Navy, who brought its seeds to England from Maine in 1605.
Like most members of the white pine group, Pinus subgenus Strobus, the leaves ("needles") are coniferous, occurring in fascicles (bundles) of 5, or rarely 3 or 4, with a deciduous sheath. The leaves are flexible, bluish-green, finely serrated, and 5–13 cm (2–5 in) long. The fascicle sheaths persist for 18 months, i.e., from the spring of one season until autumn of the next, when they abscise.
The seed cones are slender, 8–16 cm (3 1⁄4–6 1⁄4 in) long (rarely longer than that) and 4–5 cm (1 1⁄2–2 in) broad when open, and have scales with a rounded apex and slightly reflexed tip, often resinous. The seeds are 4–5 mm (5⁄32–3⁄16 in) long, with a slender 15–20 mm (5⁄8–3⁄4 in) wing, and are dispersed by wind. Cone production peaks every 3 to 5 years.
The branches are spaced about every 18 inches on the trunk with 5-6 branches appearing like spokes on a wagon wheel.
Eastern white pine is self-fertile, but seeds produced this way tend to result in weak, stunted, and malformed seedlings.
Mature trees are often 200–250 years old, and some live to over 400 years. A tree growing near Syracuse, New York was dated to 458 years old in the late 1980s and trees in Michigan and Wisconsin were dated to approximately 500 years old.