530 



TREES OF NORTH AMERICA 



A tree, occasionally 20 high, with a stem 6'-8' in diameter, covered with deeply furrowed 

 dark gray bark broken irregularly into small persistent plate-like scales, and becoming on 

 old stems often nearly black, spreading often elongated contorted branches forming a 

 broad open head, and slender zigzag branchlets dark green tinged with red and villose 

 when they first appear, soon becoming nearly glabrous, light orange-brown at midsummer, 

 dark reddish brown or purple before winter, and ultimately ashy gray, and armed with thin 

 nearly straight chestnut-brow r n spines I'-l^' long; or frequently a much-branched shrub, 

 with several stout spreading stems. 



Distribution. Dry woods in the foothill region of the southern Appalachian Mountains; 

 southwestern Virginia through western North Carolina to eastern Tennessee and northern 

 Georgia; in northern Alabama; usually at altitudes between 1500 and 3500; common. 



XVI. MICROCARPJE. 

 CONSPECTUS OF THE ARBORESCENT SPECIES. 



Fruit short-oblong; leaves orbicular to broad-ovate, pinnately 5-7-cleft. 



135. C. apiifolia (C). 

 Fruit subglobose. 



Leaves broad-ovate to triangular, long-stalked; calyx deciduous from the fruit. 



136. C. Phaenopyrum (A, C). 



Leaves spatula te to oblanceolate, short-stalked; calyx generally persistent on the fruit. 



137. C. spathulata (C). 



135. Cratsegus apiifolia Michx. Parsley Haw. 



Leaves broad-ovate to orbicular, acute at apex, truncate, slightly cordate or cuneate 

 at the broad base, and pinnately 5-7-cleft with shallow acute or deep wide sinuses, and 

 incisely lobed with broad or acute segments serrate toward the apex with spreading glandu- 



lar teeth, when they unfold pilose above with long pale hairs, and mostly glabrous below, 

 fully grown when the flowers open late in March or early in April, and at maturity thin, 

 bright green and rather lustrous above, paler and glabrous or pilose below on the promi- 

 nent midrib and primary veins, or on occasional plants pubescent on both surfaces, f'-lf ' 

 wide; petioles slender, pubescent, becoming glabrous, l'-l|' in length: leaves at the end of 

 vigorous shoots often divided nearly to the midrib, with foliaceous lunate coarsely glandu- 

 lar-serrate short-stalked stipules sometimes |' long. Flowers \' in diameter, on long slen- 



