482 



TREES OF NORTH AMERICA 



brown or gray-brown during their second year, and armed with many stout straight or 

 slightly curved bright chestnut-brown shining spines 2|'-3' long. 



Distribution. Thickets on a dry bank in the Arnold Arboretum, valley of the Mystic 

 River at West Medford, Middlesex County, Massachusetts, and near Lyme, New London 

 County, Connecticut. 



Often cultivated in the parks and gardens in the neighborhood of Boston; very conspicu- 

 ous and easily recognized in winter by its ascending remarkably zigzag branchlets. 



87. Crataegus champlainensis Sarg. 



Leaves ovate, acute, rounded, truncate, slightly cordate or broad-cuneate at base, 

 usually divided into 2 or 3 pairs of short narrow acute lobes, and coarsely often doubly 

 serrate with glandular teeth, roughened above by short pale hairs and villose below when 

 they unfold, nearly fully grown when the flowers open early in June, and at maturity thick 

 and firm in texture, conspicuously blue-green and glabrous above, light yellow-green and 

 somewhat pubescent below on the slender midrib and remote primary veins, 2'-2' long, 



Fig. 439 



and I'-H' wide; petioles slender, more or less tomentose early in the season, usually becom- 

 ing glabrous and light red below the middle before autumn, and f'-l' in length; leaves 

 at the end of vigorous shoots broad-ovate, rounded or slightly cordate at base, more 

 deeply lobed, and often 3'-4' long and wide. Flowers f ' in diameter, on short slender 

 densely villose pedicels, in compact few-flowered densely villose corymbs; calyx-tube nar- 

 rowly obconic, coated with thick hoary tomentum, the lobes lanceolate, finely glandu- 

 lar-serrate, tomentose on the outer surface usually only below the middle, villose on 

 the inner surface; stamens 10; anthers small, light yellow; styles 5, surrounded at base 

 by tufts of pale hairs. Fruit ripening early in September and usually remaining on the 

 branches during the remainder of the year, on short slightly pubescent pedicels, in com- 

 pact erect villose clusters, obovoid to short-oblong, bright scarlet, marked by scat- 

 tered pale dots, more or less villose or pubescent toward the ends; calyx prominent, per- 

 sistent, with a long tube, the lobes gradually narrowed from a broad base, acuminate, 

 finely glandular-serrate, villose, dark red on the upper side below the middle, spreading or 

 erect; flesh thick, yellow, dry and mealy; nutlets 5, ridged on the back with a broad ridge, 



T V long. 



A tree, 15-20 high, with a tall trunk 8'-10' in diameter, covered with deeply fissured 

 bark separating into thin loose plate-like scales, stout wide-spreading branches forming a 

 broad round-topped often symmetrical head, and slender somewhat zigzag branchlets 

 coated earlv in the season with hoary tomentum, soon becoming glabrous and light chest- 



