This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol1", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Pinus Strobus L. Sp. PI. 1001. 1753.
A large forest tree, reaching a maximum height of over 2250 and a trunk diameter of 10 1/2°, the bark nearly smooth except when old, the branches horizontal, verticillate. Leaves 5 in a sheath, very slender, pale green and glaucous, 3'-5' long, with a single fibro-vascular bundle, the dorsal side devoid of stomata; sheath loose, deciduous; ovule-bearing aments terminal, peduncled; cones subterminal, drooping, cylindric, often slightly curved, 4'-6' long, about 1' thick when the scales are closed, resinous; scales but slightly thickened at the apex, obtuse and rounded or nearly truncate, without a terminal spine or prickle.
In woods, often forming dense forests, Newfoundland to Manitoba, south to Delaware, along the Alleghanies to Georgia and to Illinois and Iowa. Ascends to 4300 ft. in North Carolina and to 2500 ft. in the Adirondacks. Wood light brown or nearly white, soft, compact, one of the most valuable of timbers; weight per cubic foot, 24 lbs. June. Called also Soft, Deal, Northern or Snruce-pine.
Pinus resinosa Ait. Hort. Kew. 3: 367. 1789.
A tall forest tree, reaching a maximum height of about 1500 and a trunk diameter of 5°, the bark reddish, rather smooth, flaky when old. Leaves 2 in each sheath, slender, dark green, 4'-6' long, with 2 fibro-vascular bundles; sheaths 6"-12" long when young; staminate aments 6"-9" long; cones subterminal spreading, oval-conic, 1 1/2'-2 1/2' long, usually less than 1' thick while the scales are closed; scales thickened at the apex, obtuse, rounded and devoid of spine or prickle.
In woods, Newfoundland to Manitoba, south to Massachusetts, Pennsylvania, Wisconsin and Minnesota. Wood compact, not strong, light red; weight per cubic foot 30 lbs. May-June. Called also hard- and norway-pine.
A large tree, sometimes attaining a height of 1200 and a trunk diameter of 50, the bark nearly smooth. Leaves in 3's, slender, dark green, clustered at the ends of the branches, much elongated, 8'-16' long, with 2 fibro-vascular bundles; sheaths 1'-1 1/4' long; buds long; staminate aments rose-purple, 2'-3 1/2' long, very conspicuous; cones terminal, spreading or erect, conic-cylindric, 6'-10' long, 2'-3' thick before the scales open; scales thickened at the apex, which is provided with a transverse ridge bearing a short central recurved prickle.
In sandy, mostly dry soil, often forming extensive forests, southern Virginia to Alabama, Florida and Texas, mostly near the coast. Wood hard, strong, compact, light red or orange; weight per cubic foot 44 lbs. This tree is the chief source of our turpentine, tar, rosin, and their derivatives. Also known as Southern, Yellow, Hard or Pitch Pine; Fat, Heart, Turpentine-pine; Virginia, Florida, Texas Yellow and Long-straw pine; Pine-broom and White Rosin-tree. March-April.