456 



TREES OF NORTH AMERICA 



slightly dentate near the middle, glabrous on the outer surface, slightly villose on the 

 inner surface; stamens 8-10; anthers bright purple; styles 3-5. Fruit ripening and be- 

 ginning to fall early in October, on short stout pedicels, in drooping usually 1-3-fruited 

 clusters, subglobose to slightly obovoid, scarlet, lustrous, marked by pale dots, 2'"!' in 

 diameter; calyx little enlarged, with a deep narrow cavity and spreading and incurved usu- 

 ally persistent lobes dark red on the upper side below the middle; flesh thick, yellow-green 

 and acid; nutlets 3-5, usually 4, gradually narrowed and rounded at the ends, ridged on the 

 back with a broad high grooved ridge, about \' long. 



An oval-headed tree, 20-30 high, with a short trunk sometimes 8'-10' in diameter, 



Fig. 412 



covered with dark gray scaly bark, and stout zigzag often contorted branchlets dark 

 orange-green and marked by large pale lenticels when they first appear, becoming light 

 chestnut-brown and lustrous in their first season and dull red-brown the following year, 

 and armed with few stout slightly curved chestnut-brown shining spines I'-l^' long, 

 persistent and becoming branched on old stems. 



Distribution. Rich hillsides, Kittanning, Armstrong County, and on the flood plain of 

 the Allegheny River at Whiskey Hollow across the river from Kittanning, and Lines- 

 ville, Crawford County, Pennsylvania. 



vii. TENUIFOLLE;. 



CONSPECTUS OF THE ARBORESCENT SPECIES. 



Stamens 5-10. 

 Corymbs villose. 



Leaves oblong-ovate; stamens usually 5; anthers pink; fruit obovoid to short-oblong. 



61. C. apiomorpha (A). 



Leaves oblong-obovate; stamens 10; anthers reddish purple; fruit obovoid to sub- 

 globose. 62. C. paucispina (A). 

 Corymbs glabrous; leaves oval or ovate; stamens usually 5; anthers dark reddish 

 purple; fruit short-oblong. 63. C. pentandra (A). 

 Stamens usually 20. 

 Corymbs villose. 



Leaves broad-ovate to obovate or rarely oval; fruit short-oblong to obovoid. 



64. C. lucorum (A). 

 Leaves rhombic to broad-ovate or rarely obovate; fruit ellipsoidal. 



65. C. lacera (C). 



