1905.] NATURAL SCIENCES OF PHILADELPHIA. 661 



ing very ol^liquely to the points of the lobes; petioles stout, deeply 

 grooved on the upper side, wing-margined toward the apex, slightly 

 hairy while young, soon glabrous, occasionally glandular, with minute 

 stipitate persistent glands and 2-2.5 cm. in length; leaves on vigorous 

 shoots often full and rounded at the base, more deeply lobed and more 

 coarsely serrate. Floicers 2-2.2 cm. in diameter, on long slender glab- 

 rous pedicels, in 5-9-flowered glabrous corymbs, with linear acuminate 

 gland idar bracts and bractlets, fading red ; calyx-tube narrowly obconic, 

 glabrous, the lobes slender, acuminate, nearly entire or glandular- 

 serrate, glabrous on the outer and sparingly villose on the inner surface, 

 reflexed after anthesis; stamens 10; anthers pale yellow; styles 2-4. 

 Fruit ripening about the 20th of September, on long stout erect or 

 spreading pedicels, in few-fruited clusters, subglobose, often somewhat 

 narrowed at the base, scarlet, lustrous, marked by occasional large pale 

 dots, 1-1.4 cm. in diameter; calyx little enlarged, with a wide shallow 

 cavity and spreading lobes mostly deciduous from the ripe fruit; flesh 

 thick, yellow, dry and mealy ; nutlets usually 3 or 4, gradually narrowed 

 to the rounded ends, prominently ridged on the back, with a high nar- 

 row ridge, dark colored, penetrated on the inner faces by narrow deep 

 grooves, 7-8 mm. long and 4-5 mm. wide. 



A shrub 2-3 m. high, with stout ascending stems and slender nearly 

 straight branchlets marked by oblong pale lenticels, dark orange color 

 and glabrous when they first appear, becoming bright red-brown and 

 lustrous before winter, and dull and darker colored the following season, 

 and armed with many stout or slender nearly straight purple shining 

 spines often pointing toward the base of the branch and 5-7 cm. long. 



Delaware county: Wooded slopes at Chadsford, B. H. Smith (No. 

 225, type!), September, 1902, May, 1903, May, 1904; TF. M. Canby, 

 October, 1902. 



Crataegus chadsfordiana is closeh" related to Cratcegus dumicola Sarg., 

 of the Aroostook Valley, Maine, but differs from that species in its 

 larger flowers, glabrous pedicels, usualh^ larger fruit, darker colored 

 nutlets and much thicker leaves. 



Cratcegus cordata Ait., from the south and west, and Crataegus oxy- 

 cantha L., from Europe, have become naturalized in eastern Pennsyl- 

 vania. 



