1910.] NATURAL SCIENCES OF PHILADELPHIA. 201 



light yellow-green and roughened above by short white hairs and 

 pale and glabrous below, and at maturity thin, dark yellow-green, 

 smooth and lustrous on the upper surface, pale bluish green on the 

 lower surface, 4-5 cm. long and 3-3.5 cm. wide, with thin very promi- 

 nent midribs and primary veins; petioles slender, slightly wing- 

 margined at the apex, 1.5-2 cm. in length; leaves on vigorous shoots 

 usually rounded or sometimes cuneate at the base, more coarsely 

 serrate, more deeply lobed and often 6-7 cm. long and 5-6 cm. wide, 

 with stout petioles broad-winged nearly to the middle and often 

 glandular with persistent glands. Flowers 1.5 cm. in diameter, on 

 long slender pedicels, in wide lax mostly 7-12-flowered corymbs, the 

 much elongated lower peduncles from the axils of upper leaves; calyx- 

 tube narrowly obconic, the lobes gradually narrowed from wide bases, 

 long, slender, acuminate, minutely glandular-serrate, slightly villose 

 on the inner surface, reflexed after anthesis; stamens 6—10; anthers 

 light rose color; styles 3 or 4. Fruit ripening the end of September, 

 on slender reddish pedicels, in few-fruited clusters, obovate, full and 

 rounded at the apex, gradually narrowed to the base, crimson, lus- 

 trous, marked by small pale dots, 1.2-1.5 cm. long and about 1 cm. 

 in diameter; calyx little enlarged, with a wide shallow cavity, and 

 small closely appressed lobes dark red on the upper side below the 

 middle; flesh thin, yellow, soft and succulent; nutlets 3 or 4, gradually 

 narrowed and acute at the ends but rather broader at the base than 

 at the apex, ridged on the back, with a low grooved ridge, 6-7 mm. 

 long and about 3 mm. wide. 



A broad shrub sometimes 6 m. high, with numerous stems often 

 1 dm. in diameter and covered with scaly bark, spreading branches, 

 and slender slightly zigzag branchlets light chestnut brown, lustrous 

 and marked by numerous dark lenticels in their first season and still 

 lustrous in the second year, and armed with slender slightly curved 

 chestnut brown shining spines 4.5-5 cm. long, and persistent on the 

 stems. 



Keyser Valley, near Scranton, Lackawanna County, A Twining, 

 (No. 54 type) September 30, 1907, May 23 and September 23, 1908. 

 15. Crataegus infensa n. sp. 



Glabrous with the exception of the hairs on the young leaves and 

 calyx-lobes. Leaves ovate, acuminate, abruptly concave-cuneate 

 or rounded at the base, sharply often doubly serrate, with straight 

 glandular teeth, and slightly divided into 4 or 5 pairs of small acumin- 

 ate lateral lobes ; nearly half grown when the flowers open about the 

 middle of May and then thick, dark yellow-green and slightly hairy 



