402 



TKEES OF NORTH AMERICA 



lanceolate, entire; stamens 20; anthers pale yellow; styles 2-5, usually 5, surrounded 

 at the base by conspicuous tufts of pale hairs. Fruit ripening in the autumn and 

 mostly persistent on the branches through the winter, on long slender pedicels, in 

 drooping many-fruited clusters, depressed-globose, bright scarlet or orange, \'-\' in 

 diameter; calyx little enlarged, the lobes often deciduous from the ripe fruit; flesh 

 thin and dry; nutlets usually 5, narrowed and rounded at the ends, rounded and 

 slightly grooved or ridged on the back, ^^g'-^' long. 



A tree, 20-35 high, with a straight often fluted trunk 8-12 tall and 18'-20' in 

 diameter, covered with gray or pale orange-colored bark, spreading branches forming 

 a round rather compact head, and slender glabrous bi'anchlets ashy gray to light red- 

 brown in their first winter, and unarmed or occasionally armed with slender sharp 

 pale spines |'-1' long. 



Distribution. Borders of streams and swamps in low moist soil; valley of the 

 Savannah River, South Carolina, to western Florida, through the Gulf states and 

 northward to the neighborhood of St. Louis, Missouri, and to the valley of the Colo- 

 rado River, Texas; rare in the east; abundant and of its largest size in western 

 Louisiana and eastern Texas, often forming great thickets. 



36. Crataegus ovata, Sarg., n. sp. 



Leaves ovate, acute, broadly or acutely concave-cuneate at the entire base, 

 coarsely often doubly serrate above, with glandular teeth, and occasionally slightly 

 divided into short lateral lobes, nearly fully grown when the flowers open early in 

 May and then dark green, very smooth and glabrous above with the exception of a 



few short scattered hairs near the base of the midribs, paler below, with small per- 

 sistent axillary tufts of white hairs, and at maturity membranaceous, 2-21' long and 

 1^-2' wide, with slender yellow midribs and primary veins; their petioles slender, 

 slightly winged at the apex, rose-colored in the autumn, about f long; on vigorous 

 shoots rounded or truncate at the broad base, coarsely serrate and sonietimes 3' long and 

 broad. Flowers about 1' in diameter, on long slender pedicels, in broad loose many- 

 flowered glabrous compound corymbs; calyx-tube narrowly obconic, glabrous, the 

 lobes broad, acute, entire or coarsely glandular-serrate toward the apex, glabrous; 

 styles 5. Fruit ripening in October, on elongated pedicels, in long drooping clusters, 



