452 



TREES OF NORTH AMERICA 



linear-obovate glandular bracts and bractlets usually persistent until the flowers open; 

 calyx-tube broadly obconic, glabrous, the lobes separated by wide sinuses, short, broad, 

 acuminate, coarsely glandular-serrate, slightly villose on the inner surface; stamens 20; 

 anthers white; styles 5, surrounded at base by a broad ring of pale tomentum. Fruit ripen- 

 ing early in October on short stout spreading pedicels in 2 or 3-fruited clusters, broader than 

 high, distinctly 5-angled, rounded at the wide apex, truncate at base, with a deep depres- 

 sion at the insertion of the pedicel, scarlet, pruinose, becoming lustrous, marked by numer- 

 ous large pale dots, f i' broad, and about f high; calyx-lobes deciduous; flesh thin, light 

 yellow slightly tinged with red, remaining on the ground through the winter without be- 

 coming soft; nutlets 5, thin, acute at apex, rounded at base, rounded and slightly grooved or 

 ridged with a low grooved ridge on the back, \'-\' long and wide. 



Fig. 408 



A tree, 20-25 high, with a tall stem 5'-6' in diameter covered with dark scaly bark, and 

 stout nearly straight branchlets dark orange-green when they first appear, becoming light 

 chestnut-brown, lustrous and marked by small pale lenticels in their first season, and dull 

 reddish brown the following year, and armed with stout straight or slightly curved purplish 

 spines l'-l|' in length. 



Distribution. Rich hillsides, near Shrewsbury, St. Louis County, Missouri. 



57. Crataegus disjuncta Sarg. 



Leaves broad-ovate, acuminate, full and rounded or concave cuneate at the entire base, 

 sharply often doubly serrate above with straight or incurved glandular teeth, and slightly 

 and irregularly divided above the middle into narrow acuminate spreading lobes, thin, gla- 

 brous, dark blue-green above, pale below, 2'-3' long, and 2|'-2^' wide, with a slender yel- 

 low midrib, and 4 or 5 pairs of thin primary veins extending obliquely to the point of the 

 lobes; petioles slender, wing-margined at apex, glandular, I'-l \' in length. Flowers opening 

 the first of May, f ' in diameter, on long stout pedicels, in glabrous compact 3-6 usually 

 5-flowered glabrous corymbs, with conspicuous glandular early deciduous bracts and bract- 

 lets; calyx-tube narrowly obconic, glabrous, the lobes slender, acuminate, glabrous, entire 

 or sparingly glandular-serrate; stamens 10; anthers large, dark rose color; styles 4 or 5, 

 surrounded at base by a narrow ring of pale tomentum. Fruit on stout rigid pedicels, in 

 drooping or spreading clusters, subglobose, usually rather broader than high, angled, 

 green more or less tinged with red, pruinose, '-f in diameter; calyx prominent, with a 

 short tube and much enlarged spreading or erect lobes usually deciduous at midsummer; 

 flesh thin, greenish yellow; nutlets usually 4, rounded at the ends, deeply grooved on the 

 back, about \ r long. 



A tree, 15-18 high, with a tall slender trunk, covered with dark slightly scaly bark, small 



