. 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. 48 The Pines globose-ovoid when open, 8 to 12 cm. long, oblique, light brown and shining, opening when ripe and gradually dropping the seed or remaining closed for several years, usually persisting on the branches for from fifteen to twenty-five years. The scales are thin and woody, their exposed portion much thickened, conspicu- ously ridged, thick-knobbed and armed with a stout spine, which is upcurved above and recurve
. 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. 48 The Pines globose-ovoid when open, 8 to 12 cm. long, oblique, light brown and shining, opening when ripe and gradually dropping the seed or remaining closed for several years, usually persisting on the branches for from fifteen to twenty-five years. The scales are thin and woody, their exposed portion much thickened, conspicu- ously ridged, thick-knobbed and armed with a stout spine, which is upcurved above and recurved below the middle of the cone; they are dark purphsh or red- dish on the unexposed surfaces. The seeds are nearly triangular, 6 to 7 nun. long, rounded on the sides, hght brown and roughened, their wing thin, fragile, pale and shining, often streaked with red, about 2 cm. long, broadest below the middle, oblique and gradually rounded at the apex. The wood is soft, weak, and brittle, very coarse-grained, resin bands con- spicuous and passages large; its specific gravity is about It is extensively used for fuel and also made into charcoal. 36. PRICKLE CONE PINE —Pinus muricata D. Don A tree of coastal Cahfomia occurring in isolated stations from Mendocino county southward into Lower Cahfomia, reaching its greatest development of 27 meters taU and a trunk diameter of 9 Fig. 38. — Prickle-Cone Pine. The branches are stout, horizontal, forming a regular conic tree when young; older trees are dense and round-topped. The bark is up to dm. thick, deeply furrowed into long elongated, rounded ridges which are roughened by close, dark. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Britton, Nathaniel Lord, 1859-1934; Shafer, John Adolph. New York : H. Holt and Co.
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