. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. White Pine Cones conic, much incun'ed; northern tree. Spines of the cone-scales well developed. Cones 4 to 7 cm. long. Twigs not glaucous; leaves slender, i ram. thick. Twigs glaucous; leaves stout, to 2 mm. thick. Cones 10 to 13 cm. long, globose or depressed; scales with hooked spines. Western tree; cone-scales with short incurved spines. 32. P. Banksiana. ^1^. P. clausa. 34. P. virginiana. 35. P. pungens. 36. P. mu
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. White Pine Cones conic, much incun'ed; northern tree. Spines of the cone-scales well developed. Cones 4 to 7 cm. long. Twigs not glaucous; leaves slender, i ram. thick. Twigs glaucous; leaves stout, to 2 mm. thick. Cones 10 to 13 cm. long, globose or depressed; scales with hooked spines. Western tree; cone-scales with short incurved spines. 32. P. Banksiana. ^1^. P. clausa. 34. P. virginiana. 35. P. pungens. 36. P. muricata. I. WHITE PINE —Pinus Strobus Linnaeus The White pine, or Weymouth pine, is the most valuable forest tree of eastern North America, and one of the most beautiful of conifers. It occurs from New- foundland to Ontario and Manitoba, south, near the Atlantic coast to east-central New Jersey, along the Alleghany Mountains to Georgia and eastern Tennessee, and to Illinois and Iowa. It prefers the moist loose soil of hillsides and mountain slopes, occasionally, however, growing in quite swampy situations. The tree attains a maximum height of about 80 meters, with a trunk sometimes 2 meters in diameter. The bark of old trees is very thick and fissured, that of young trees much thinner, smooth, or nearly so, green or red- dish. The young twigs are somewhat vel- vety, but soon become smooth and brown. The buds are pointed and about i cm. long. The leaves are 5 in each sheath, very slender and flexible, pale green or bluish green, 7 to 12 cm. long; their sheaths are loose, composed of several nearly separate scales, and fall away soon after the leaves are grown. The staminate flowers are nu- merous, borne laterally on the lower part of shoots of the-season, oblong, blunt, yellow, and about i cm. long, subtended by several scales. The pistillate flowers are stalked, usually several together at the ends of the shoots, and at flowering time in June are about 7 mm. long. The cones ri
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