1910.] XATRUAL SCIENCES OF PHILADELPHIA. 155 



and armed with very numerous slender, straight or slightly curved 

 chestnut brown spines 2.5-5 cm. long. 



McKees Rocks, Allegheny County, O. E. Jennings, B. H. Smith and 

 C. S. Sargent, (No. 24 type) September 28, 1905, O. E. Jennings, May 

 24, 1906. 



5. Crataegus phlebodia n. sp. 



Glabrous. Leaves narrowly obovate, acuminate gradually con- 

 tracted to the long slender concave-cuneate base, and finely often 

 doubly serrate, with straight or incurved glandular teeth ; more than 

 half-grown when the flowers open late in May and then thin, yellow- 

 green, smooth and lustrous above, pale below, and at maturity thin, 

 dark yellow-green on the upper surface, paler on the lower surface, 

 3.5-5 cm. long and 2-2.2 cm. wide, with thin very prominent mid- 

 ribs and primary veins; petioles slender, narrowly wing-margined to 

 below the middle, 8-10 mm. in length. Flowers 1.8-2 cm. in diameter, 

 on long slender glabrous pedicels, in mostly 10-18-flowered corymbs, 

 the long lower peduncles from the axils of upper leaves; calyx-tube 

 narrowly obconic, the lobes short, slender, acuminate, minutely 

 glandular-dentate near the middle, reflexed after anthesis; stamens 

 15-20; filaments persistent on the ripe fruit; anthers faintly tinged 

 with pink; styles 1-3. Fruit ripening the end of September, on 

 slender drooping pedicels, in few-fruited clusters, short-oblong, full 

 and rounded at the ends, dull scarlet, blotched with green at the apex, 

 marked by large pale dots, 1-1.2 cm. long and nearly as broad; calyx 

 little enlarged, with a narrow deep cavity pointed in the bottom, and 

 small spreading often deciduous lobes; flesh thin, yellow-green, dry 

 and hard; nutlets 1-3, full and rounded at the ends or sometimes 

 acute at the base, ridged on the back /with a high broad ridge, 7.5-8 mm. 

 long and 4-4.5 mm. wide, or, when 1, 5-5.5 mm. in diameter. 



A tree sometimes 5-6 m. high, with a trunk 2.5-3 dm. in diameter 

 covered w r ith pale scaly bark, large erect and spreading branches 

 forming an oblong round-topped head, and slender onry slightly 

 zigzag branchlets dark orange-green and marked by pale lenticels when 

 they first appear, becoming light orange-brown in their first season 

 and pale gray-brown the following year, and armed with many slender 

 straight or slightly curved light brown spines 4-5 cm. long, and very 

 numerous and compound on old stems and branches. 



Border of oak woods, near Bedford Springs, Bedford County, B. H. 

 Smith and C. S. Sargent, (No. 295 type) September 30, 1905; B. H. 

 Smith, May IS. 1906; Orbisonia, Huntingdon County, B. H. Smith. 

 (No. 316) May 20. 1906. October, 1907. 



