440 TREES OF NORTH AMERICA 



Fruit ripening in October, on elongated pedicels, in long drooping clusters, subglobose or 

 a little longer than broad, orange-red, I' jV l n g' calyx enlarged, with elongated closely 

 appressed lobes sometimes deciduous from the ripe fruit; nutlets 5, acute at the ends, 

 rounded or slightly ridged on the back, about fa' long. 



A tree, 25-30 high, with a tall trunk sometimes a foot in diameter, covered with smooth 

 gray bark, slender glabrous branchlets light reddish brown and lustrous during their first 

 year, becoming grayish brown in their second season, and unarmed or armed with occa- 

 sional dark purple slender slightly curved shining spines 1' long. 



Distribution. Low moist soil on the banks of the River Desperes, South St. Louis, St. 

 Louis County, and near Alba, Jasper County, Missouri. 



43. Crataegus vulsa Beadl. 



Leaves oval or ovate, acute, broad and rounded or broad-cuneate at the entire base, 

 irregularly and often doubly serrate above with straight or incurved gland-tipped teeth, 

 and often divided into several short acute lateral lobes, w r hen they unfold dark bronze-red, 

 and pilose with scattered caducous hairs, and furnished below with tufts of pale often per- 



Fig. 395 



sistent hairs in the axils of the principal veins, nearly fully grown when the flowers open 

 late in April, and at maturity thin, bright green on the upper surface, paler on the lower 

 surface, about 2' long and 1^' wide, with a slender midrib and 4 or 5 pairs of thin pale yello\* 

 primary veins; turning in the autumn yellow or brown; petioles slender, somewhat villosc 

 at first, soon becoming glabrous, about f in length; leaves at the end of vigorous shoots 

 broadly ovate, acute or acuminate, broad and rounded or occasionally truncate or broadly 

 cuneate at base, more coarsely serrate and more deeply lobed, often 3' long and 2|' wide, 

 with a stout winged glandular petiole. Flowers f ' in diameter, on slender pedicels, ii 

 compact 3-10-flowered corymbs, with linear acuminate glandular red bracts and bractlets 

 calyx-tube broadly obconic, glabrous, the lobes gradually narrowed from a broad base, 

 acuminate, entire or occasionally obscurely serrate toward the apex, glabrous; stamens 

 20; anthers pale yellow; styles 3-5, surrounded at base by a thin ring of pale hairs. Frail 

 ripening at the end of September or early in October, on slender pedicels, in few-fruited 

 drooping clusters, globose, yellow-green flushed with red, $' in diameter; calyx prominent, 

 with closely appressed lobes; flesh yellow-green; nutlets 3-5, thin, rounded, sometimes 

 slightly ridged and grooved on the back, about fa' long. 



A tree, occasionally 20 high, with a tall trunk 5 '-6' in diameter, covered with thin 

 fissured bark separating into light gray scales tinged with brown, and often armed with 

 long compound spines, ascending or spreading branches forming an oval usually compact 



