ROSACES 485 



doubly serrate above with straight or incurved glandular teeth, about half grown when 

 the flowers open the middle of May, and then roughened above by short pale hairs and 

 villose below on the slender midrib and primary veins, and at maturity thin, light green 

 and scabrate on the upper surface, pale and nearly glabrous on the lower surface, 2|'-3^' 

 long, and 2'-3' wide; petioles slender, villose early in the season, finally glabrous, l^'-2' in 

 length; stipules oblong-obovate, acute, villose, coarsely glandular-serrate, f long, those of 

 the upper leaves mostly persistent until after the ripening of the fruit. Flowers 1' in 

 diameter, on short stout hairy pedicels, in many-flowered densely villose corymbs; calyx- 

 tube broadly obconic, villose, the lobes long, lanceolate, glandular with small pale stalked 

 glands, villose on both surfaces; stamens 10, sometimes 8; anthers small, rose color; styles 

 3-5. Fruit ripening and falling at the end of September, on slender glabrous pedicels, in 

 drooping villose many-fruited crowded clusters, short-oblong, full and rounded at the ends, 

 bright crimson, lustrous, covered at the ends with scattered pale hairs, 1' long, and |'-f' in 

 diameter; calyx little enlarged, the lobes elongated, glandular-serrate above the middle, 



Fig. 442 



villose on the inner surface, spreading, or erect and incurved; flesh thin, yellow, juicy and 

 acid; nutlets 3-5, thick, pale brown, deeply and often doubly and irregularly grooved on 

 the back, \'-\ f long. 



A tree, sometimes 20 high, with a tall trunk often a foot in diameter, covered with 

 pale gray scaly bark, stout ascending branches forming a broad symmetrical head, and 

 slender zigzag branchlets dark green and clothed at first with long matted pale hairs, be- 

 coming in their first summer light chestnut-brown and slightly villose, dark chestnut- 

 brown and very lustrous in their second year, and armed with stout straight or somewhat 

 curved dark chestnut-brown shining spines l^'-2' long. 



Distribution. Western New York (common) to western Pennsylvania, and through 

 southern Ontario to southern Michigan. 



91. Crataegus Robesoniana Sarg. 



Cratcegus spissiflora Sarg. 



Leaves oblong-ovate, acute or acuminate at apex, rounded broadly cuneate or rarely 

 cordate at the entire base, sharply doubly serrate above with slender straight gland-tipped 

 teeth, and deeply divided into numerous broad acute or acuminate lateral lobes, villose 

 above and densely tomentose below when they unfold, about half grown when the flowers 

 open at the end of May and then roughened above by short rigid white hairs and pubescent 



