. Bulletin (Pennsylvania Department of Forestry), no. 11. Forests and forestry. 176 .<l| t COCKSPUR THORN Crataegus Crus-galli, Linnaeus 0ENT7S DESCRIPTIONâThe genns Crataegfus has the center of Itg distribution In eastern North America. It reaches its best development In the great liroe»tone formations rather common in this part of America. Prior to 1900 fewer than 76 species were known In the world, of which number about 30 were native to North America. At the present time about 700 species of trees and shrubs belonging to this genus have been described. In the State »' New York alone 2
. Bulletin (Pennsylvania Department of Forestry), no. 11. Forests and forestry. 176 .<l| t COCKSPUR THORN Crataegus Crus-galli, Linnaeus 0ENT7S DESCRIPTIONâThe genns Crataegfus has the center of Itg distribution In eastern North America. It reaches its best development In the great liroe»tone formations rather common in this part of America. Prior to 1900 fewer than 76 species were known In the world, of which number about 30 were native to North America. At the present time about 700 species of trees and shrubs belonging to this genus have been described. In the State »' New York alone 218 species have been described. Porter, In his Flora of Pennsylvania, published In 1908, records 16 species as native to this State. Only 2 species arc described in this bulletin beca»se they are practically of no commercial Importance and very difficult to Identify. FORMâA small tree sometimes reaching a height of 26 ft. with a diameter of 10-12 inches. Trunk short, bearing stout and spreading branches which form a broad and rath«r flat crown. BASKâGrayish to reddish-brown, sometimes roughened by small scales. TWI08âSmooth, rather slender, at first greenish, lattr light brown to gray, usually bearing straight or slightly curved and unbranched chestnut-brown thorns about 3 inches long. BUDSâAlternate, i of an inch long, often almost spherical, very blunt-pointed, terminal bud usually present and about the same size as the laterals. Lateral accewwry buds are often found at the bases of thorns. Btids are covered with numerous, thick, blunt-pointed, chestnnt- browoi scales. LEAVESâAlternate, simple, obovate to elliptical, 1-3 Inches long, long-taperlng at base, rounded or short-pointed at apex, sharply serrate on margin except towards base; smooth, thick, and shiny on the upper surface when full grown. Petioles short and broad. LEAF-SCARSâAlternate, more than 2-ranked, small, cresent-shaped, containing 3 bundle- scars. FLOWERSâAppear about June when leaves are fu
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