186 FLORA OF PHILADELPHIA. 



X. TOMENTOSAE. 



Leaves thin, with midribs and veins only slightly impressed on their upper 

 surface; fruit obovate to oblong, orange or orange-red; stamens 20. 

 Anthers rose-color. 77. C. tomejitosa. 



Anthers yellow. 78. C. structilis. 



Leaves subcoriaceous to coriaceous, with midribs and veins deeply impressed 

 on their upper surface, fruit subglobose to short-oval, usually scarlet. 

 Stamens 20. 



Anthers rose-color or pink. 



Leaves villose below at maturity. 



Pedicels villose; fruit long-stalked, in drooping clusters, 

 often 15 mm. in diameter; leaves elliptical, acute at the 

 ends; anthers light or dark rose-color. 



79. C. succulent a. 

 Pedicels glabrous; fruit in erect pedicels, in few-fruited 

 clusters, about 10 mm. in diameter; leaves rhombic to 

 obovate ; anthers pale pink. 80. C. radiosa. 



Leaves nearly glabrous below at maturity, ovate to oval or 

 obovate; fruit in erect glabrous pedicels, in few-fruited 

 clusters, 7-8 mm. in diameter; anthers dark rose-color. 



81. C micrantha. 

 Anthers yellow ; leaves rhombic to oval ; fruit on drooping, slightly 

 villose pedicels in many-fruited clusters. 82. C. opica. 

 Stamens 10; anthers pale yellow; leaves ovate to rhombic; fruit on 

 erect or spreading glabrous pedicels in few-fruited clusters. 



83. C. Chads f or diana. 



B. Naturalized species; veins of the leaves attaining the points of the 

 lobes, and also extending to the sinuses ; stamens 20, anthers rose- 

 color. 



Fruit depressed-globose, 6 mm. in diameter, bright crimson ; leaves 

 broadly ovate to triangular, 3-7-lobed, rounded or cordate at the 

 entire base. 84. C. cordata. 



Fruit ovoid, 8-9 mm. long, purple when mature ; leaves obovate, broadly 

 cuneate at the base, laciniately 3-7-lobed. 85. C. Oxyacantlia. 



1. CRATAEGUS Crus-galli L. Cock-sj)ur Thorn, New Castle Thorn. M. p. 



519. Common in old hedge-rows and thickets near the Delaware 

 River. Spring. 



la. Crataegus Crus-galij pyracanthifolia Ait. With narrower elliptical 

 to obovate leaves and smaller bright red fruit. Not rare in eastern 

 Pennsylvania and northern Delaware (Sargent). 



lb. Crataegus Crus-galli oblongata Sarg. Bot. Gaz., xxxv, 99, Feb., 1903. 

 Fruit oblong, often 2.5 cm. long; nutlets 1-2, acute at the ends. 

 Bucks— Durham (Fr.). Berks— 'North Heidelberg (Gruber). 

 New Castle — Meadow near Edgemoor (Canby). 



Ic. Crataegus Crus-galli capillata Sarg. Bot. Gaz., xxxv, 100, Feb., 

 1903. Leaves oblong-ovate, rounded or acute at the apex, thin but 

 firm in texture ; corymbs slightly villose ; fruit subglobose ; nutlets 

 1, rarely 2. 



Philadelphia — In a meadow at the head of Wissahickon Drive (Canby). 



New Castle — In woods one mile east of Christiana (Canby). 



2. Crataegus rivalis Sarg. Proc. A. N. S. Philada., Ivii. 



jBwc^s— Meadows of Perkiomen Creek, Sellersville (Fr.). 



