1905.] NATURAL SCIENCES OF PHILADELPHIA. 585 



Calyx-tube long ; fruit dry and mealy, . .11. C . wplandia . 



Calyx-tube short; fruit bitter and acid, . 12. C. callosa. 



Leaves narrow-ovate to oblong-ovate; shrubby, usually 



2-5 m. high. 



Flowers about 1.2 cm. in diameter, in compact mostly 



4-7-flowered corymbs ; fruit often obovate, 



13. C. cestrica. 

 Flowers often 2 cm. in diameter, in lax 5-10-flowered 



corymbs, . ■ 14. C augusta. 



Fruit obovate, dull green tinged with red, 1-2 cm. long; leaves 



oblong-ovate, 15. C insueta. 



lieaves coriaceous, oblong-ovate to oval, acuminate and long- 

 pointed, glabrous; fruit pyriform, sometimes becoming ob- 

 long, dark crimson, 1-1.2 cm. long. ... 16. C. porteri. 

 Stamens 10 or less. Anthers pink, dark rose color or purple. 

 Leaves smooth on the upper surface. 



Leaves ovate to rhombic, cuneate at the base; fruit depressed- 

 globose, crimson, slightly pruinose, 1-1.2 cm. in diameter; 



anthers pale pink, 17. C. dissona. 



Leaves rhombic or occasionally oblong-ovate, deeply laciniately 

 lobed ; fruit oblong to short-oblong, crimson, covered with a 

 thick glaucous bloom, about 1.2 cm. long; anthers purple, 



18. C. alacris. 

 Leaves oval to ovate, cuneate at the base; fruit short-oblong to 



ovate, conspicuously mamillate at the base, dull red, covered 

 with a glaucous bloom, 1-1.2 cm. in diameter; anthers purple, 



19. C. deducta. 

 Leaves scabrate on the upper surface; anthers dark rose color. 



Pedicels glabrous. 



Leaves ovate, as broad as long, truncate or rounded at the broad 

 base; fruit depressed-globose, bright red, 1-1.2 cm. in 



diameter, 20. C deltoides. 



Leaves ovate, usually rounded or cuneate at the base; fruit obo- 

 vate, greenish-red, with a crimson cheek, 1.2-1.5 cm. long, 



21. C. fretzii. 



Leaves ovate to rhombic, rounded or cuneate at the base; fruit 



obovate, orange red, 8-10 mm. long, . 22. C. scabriuscula. 



Pedicels villose; leaves ovate, usually rounded or truncate at the 



broad base, deeply lobed; fruit oblong to obovate, dull red, 



covered with a glaucous bloom, 1.4-1.5 cm. long, 



23. C. delicata. 

 1. Crataegus pruinosa K. Koch. 



Verhandl. Preuss. Gart. Verein, neue Reihe, I. 246 (Crataegus unci Mespilus) 

 (18.54). Sargent, Silva N. Am., XIII, 61, t. 648; Man. 411, f. 331. 



Philadelphia county: Kingsessing, B. H. Smith (No. 208), May, 1902, 

 May and October, 1903, May, 1904. Berks county: Near West Lees- 

 port, C. L. Gruher (No. 110), 1902, September, 1903, May and August 

 1904; Forge Hill, North Heidelberg township, C. L. Gruher (No. 104) 



