490 



TREES OF NORTH AMERICA 



long. Flo"wers ^' in diameter, on slender pedicels, in crowded glabrons niany-flovv- 

 ered compound corymbs; calyx-tube narrowly obconic, glabrous, the lobes short, 

 nearly triangular, gradually narrowed to the gland-tij)ped apex, entire; petals turn- 

 ing bright orange color in fading; stamens 15-20; styles 3-5. Fruit ripening and 

 falling the middle of August, on slender erect pedicels, in few-fruited clusters, sub- 

 globose or rarely obovate, bright blue covered with a glaucous bloom, ^'-^' in diame- 

 ter; calyx slightly enlarged, with spreading lobes; flesh thin; nutlets 3-5, narrowed 

 and acute at the base, full and rounded at the apex, rounded and slightly grooved on 

 the back, about \' long. 



A tree, 40-50 high, with a tall trunk 18'-20' in diameter, covered with thick 

 dark brown deeply furrowed scaly bark, and divided usually 5-10 from the ground 

 into stout spreading light gray branches forming a broad compact round-topped 

 head, and branchlets light green and slightly pubescent at first, soon becoming 



glabrous and pale red-brown and ultimately ashy gray, and armed with numerous 

 short stout generally curved or sometimes straight slender spines j'-f long and 

 often terminal also on the lateral branchlets of vigorous shoots. 



Distribution. Borders of streams in rich moist soil; Texarkana, southern Arkan- 

 sas, through western Louisiana to the valley of the Sabine River, Texas; in the neigh- 

 borhood of Opelousas, Louisiana, surrounding with dense groves low wet prairies, and 

 a conspicuous and beautiful feature of the arborescent vegetation. 



120. Crataegus saligna, Greene. 



Leaves narrowly rhombic to oval, gradually narrowed at the ends, acute or acu- 

 minate and apiculate at the apex, entire toward the base, finely serrate above, with 

 incurved teeth tipped with minute bright red glands, nearly fully grown when the 

 flowers open toward the middle of June, light yellow-green, covered above with short 

 pale hairs and pale and glabrous below, and at maturity thick and firm, dark green, 

 glabrous and lustrous above, pale below, l^'-2' long and f-V wide, with stout mid- 

 ribs rose color on the upper side, dark obscure forked veins, and reticulate veinlets, 

 turning late in the autumn to brilliant shades of orange and bright scarlet; their 

 petioles slender, about 1' long and glandular near the base, with 2 or 3 large stipi- 

 tate dark red caducous glands; on vigorous leading shoots lanceolate, acuminate, 



