1910.] NATURAL SCIENCES OF PHILADELPHIA. 169 



on the back, with a broad high deeply grooved ridge, 7-7.5 mm. long 

 and 4-4.5 mm. wide. 



A shrub sometimes 4 m. high, with stems 1.5 dm. in diameter, 

 spreading into large thickets, and slender nearly straight branchlets, 

 dark orange-green more or less tinged with red when they first appear, 

 dark chestnut brown, lustrous and marked by dark lenticels in their 

 first season and darker-colored the following year, and armed with 

 slender straight or slightly curved purple shining spines 2-4 cm. long. 



Low ground, valley of the Conemaugh River between Portage and 

 Wilmore, Cambria County, B. H. Smith, (275 type) May 21, 1905, 



B. H. Smith and C. S. Sargent, September 27, 1905. 



4. Crataegus arcana Beadle. 



Bilt. Bot. Studies, I, 122 (1902); Small, Fl. S. E. States, 564; Sargent, 

 t Bot. Gazette, XXXV, 101 (The Genus Crataegus in Newcastle County, 



Delaware); Proc. Acad. Nat. Sci. Phila., 1905, 588; Bull. CXXII, N. Y. 



State Mus., 37. 



Dry hillsides, valley of the Little Juniata River below Altoona, 

 Blair County, B. H. Smith, (No. 282) May 22, 1905, B. H. Smith and 



C. S. Sargent, September 27, 1905, B. H. Smith, May 17, 1906; also 

 western New York to eastern Pennsylvania, Delaware and western 

 North Carolina. 



•5. Crataegus crawfordiana n. sp. 



Glabrous. Leaves ovate, acuminate, abruptly cimeate or rounded 

 at the base, finely often doubly serrate, with straight glandular teeth, 

 and slightly divided into 4 or 5 pairs of small spreading acuminate 

 lateral lobes; nearly fully grown when the flowers open in the first 

 week of June and then very thin, dark yellow-green above and pale 

 below, and at maturity thin, yellow-green, smooth and lustrous on 

 the upper surface, pale on the lower surface, 4.5-5 cm. long and 3.5-4 

 cm. wide, with thin prominent midribs and veins; petioles slender, 

 glandular, with minute often persistent glands, 2-2.5 cm. in length. 

 Flowers 1.3-1.9 cm. in diameter, on long slender pedicels, in wide lax 

 mostly 8-12-flowered corymbs, the lower peduncles from the axils of 

 upper leaves; calyx-tube narrowly obconic, the lobes short, slender, 

 finely glannular-serrate toward the acuminate apex, reflexed after 

 anthesis; stamens usually 20; anthers pink; styles 3 or 4. Fruit 

 ripening early in October, on stout pedicels, in few-fruited drooping 

 clusters, oval to pyriform-oval, rounded at the apex, gradually rounded 

 at the base, dark orange-red blotched with yellow-green, marked by 

 large pale dots, somewhat pruinose, 1.2-1.3 cm. long and 1-1.2 cm. 

 in diameter; calyx prominent, with a distinct tube, a deep narrow 



