182 PROCEEDINGS OF THE ACADEMY OF [March, 



Rocky knell, Orbisonia, Huntingdon County, B. H. Smith, (Nos. 

 308 type, 303) May 19, 1906, October 8, 1907, B. H. Smith and C. S. 

 Sargent, (No. 303) October 9, 1906, B. H. Smith, (No. 305) May 19, 

 1906, October 8, 1907, B. H. Smith and C. S. Sargent, October 7. 

 1906, B. H. Smith and C. S. Sargent, (No. 305 A) October 9, 1906. 

 19. Crataegus tribulosa n. sp. 



Glabrous with the exception of the hairs on the upper surface of 

 the young leaves and on the petioles. Leaves broadly ovate, acute 

 or acuminate, rounded or truncate at the wide base, sharply often 

 doubly serrate, with glandular teeth, and divided into 3 or 4 pairs 

 of short broad lateral lobes; about half -grown when the flowers open 

 the middle of May and then thin, yellow-green and slightly hairy on 

 the upper side of the midribs, and pale bluish green below, and at 

 maturity thick, dark yellow-green, smooth and lustrous on the upper 

 surface, paler on the lower surface, 4-5 cm. long and 4-4.5 cm. wide, 

 with thin prominent yellow midribs and primary veins; petioles 

 slender, glandular, with minute often persistent glands, sparingly 

 villose on the upper side while young, becoming glabrous, often rose 

 color in the autumn, 1.5-2.5 cm. in length; leaves on vigorous shoots 

 truncate or slightly cordate at the base, more coarsely serrate and 

 more deeply lobed, and often 5-6 cm. long and wide. Flowers 2-2.2 

 cm. in diameter, on long slender pedicels, in narrow mostly 4- or 

 5-flowered corymbs, with oblong-obovate to linear acute glandular- 

 serrate green bracts and bractlets often persistent until the flowers 

 open, the elongated lower peduncles from the axils of upper leaves; 

 calyx-tube broadly obconic, the lobes separated by wide sinuses, 

 short, broad, acuminate, entire or occasionally minutely dentate 

 reflexed after anthesls; stamens 20; anthers cream color; styles 4 or 

 5. Fruit ripening at the end of September, on long slender pedicels, 

 in few-fruited clusters, short-oblong to subglobose, often rather 

 broader than high, slightly angled, dull green tinged with red, about 

 1 cm. in diameter ; calyx prominent, with a short tube, a broad shallow 

 cavity wide in the bottom, and spreading and reflexed lobes; flesh 

 thin, green, dry and hard; nutlets 4 or 5, rounded at the ends but 

 narrower at the apex than at the base, rounded and slightly ridged on 

 the back, 5-5.5 mm. long and about 4 mm. wide. 



A narrow shrub 3 or 4 m. high, with stems sometimes 4-6 cm. in 

 diameter, covered with dark red scaly bark, small branches, and slender 

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

 when they first appear, becoming light chestnut brown and lustrous 

 in their first season and dull red-brown the following vear, and armed 



