. 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. Alaska Birch 3^49 it is used for barrel-hoops, shoe-pegs, largely for spools, and somewhat for paper- pulp. The tree grows fast but is short-Uved. 2. BLUE BIRCH — Betula coerulea W. H. Blanchard This recently described species is very closely related to the Gray birch, and is reported from moist mountain sides at altitudes of about 550 meters in Vermont and Maine, and probably occurs in simi- lar situations throughout the
. 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. Alaska Birch 3^49 it is used for barrel-hoops, shoe-pegs, largely for spools, and somewhat for paper- pulp. The tree grows fast but is short-Uved. 2. BLUE BIRCH — Betula coerulea W. H. Blanchard This recently described species is very closely related to the Gray birch, and is reported from moist mountain sides at altitudes of about 550 meters in Vermont and Maine, and probably occurs in simi- lar situations throughout the north- eastern portion of our area. It reaches a height of 20 meters, with a trunk di- ameter of dm. in its large-leaved form, or about half these dimensions in the smaller-leaved form. The rather small branches are nearly upright at iirst, but become spreading. The bark is about 6 mm. thick, its outer layer somewhat shining, white with a reddish tinge, the iimer bark yellowish. The twigs are slender, slightly long-hairy and purpUsh at first, becoming reddish brown and quite smooth, except for nu- merous pale lenticels. The leaves are ovate, 5 to 7 or 9 cm. long, sharply and quite regularly toothed toward the long, taper-pointed apex, quite entire near the rounded or wedge-shaped, sometimes un- equal base, pale glandular at first, soon. Fig. 204. — Blue Birch. becoming smooth and dull bluish green,above, pale yellowish green and shghtly hairy along the principal veins beneath; the leaf-stalk is slender, 2 to 3 cm. long, often reddish. The staminate catkins, sometimes in pairs, are cylindric, 3 to 5 cm. long or longer. The fruiting catkins are drooping, slender, cylindric, 2 to 3 cm. long, slightly tapering at the blunt apex, their stalks about i cm. long. The nut is oval, its wing much broader than the body. The large form with leaves more rounded at the base, thicker fruiting catkins, and generally larger in all its parts, has been called Betula coerulea-grandis by Bl
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