ROSACES 



369 



ripening late in October and persistent on the branches until spring, short-oblong to 

 subglobose, ^' long, dull red often covered with a glaucous bloom; flesh dry and 

 mealy; calyx little enlarged; nutlets usually 2, full and rounded at the ends, pro- 

 minently ridged on the back, with a high rounded grooved ridge, \' long. 



A tree, sometimes 25 high, with a trunk a foot in diameter, and stout rigid spread- 

 ing branches forming a broad round-topped head, glabrous, light brown or gray 

 branchlets armed with stout straight or slightly curved sharp-pointed chestnut-brown 

 or ashy gray spines 3'-4' long and becoming on the trunks and large branches 6'-8' 

 long and furnished with slender lateral spines. 



Distribution. Usually on the slopes of low hills in rich soil; valley of the St. 

 Lawrence River near Montreal, southward to Delaware and along the Appalachian 

 foothills to North Carolina, and westward through western New York and Pennsyl- 

 vania to southern Michigan. 



A form, var. pyracanthifolia, Ait., with narrower elliptical to obovate leaves acute 

 or rounded at the apex, and slightly pubescent while young on the upper side of the 

 midribs, and with rather smaller flowers and smaller bright red fruit, is not rare in 

 eastern Pennsylvania and northern Delaware; a form, var. salicifolia, Ait., cultivated 

 in European gardens, but not known in a wild state, with thinner narrower and 

 more elongated lanceolate or oblanceolate leaves, should also probably be referred to 

 this species. A form, var. oblongata, Sarg., with rather brighter colored oblong fruit 

 often 1' long, and nutlets acute at the ends, is not rare near Wilmington, Delaware, and 

 at Durham, Bucks County, Pennsylvania. A form, var. capillata, Sarg., with thinner 

 leaves, slightly villose corymbs, and 1 or rarely 2 nutlets, occurs near Wilmington, 

 Delaware. 



Often cultivated as an ornamental plant and for hedges^ in the eastern United 

 States, and very frequently in the countries of eastern and northern Europe. 



2. Crataegus Canbyi, Sarg. 



Leaves oblong-ovate to ovate or rarely obovate, acute or rarely rounded at the 

 apex, gradually narrowed, cuneate and entire at the base, and coarsely and often 

 doubly serrate above the middle, more than half grown when the flowers open about 



the 1st of May and then glabrous or very rarely with a few scattered hairs on the. 

 upper side of the midribs and on the corymbs, at maturity coriaceous, glabrous, dark 



