166 PROCEEDINGS OF THE ACADEMY OF [March, 



Fruit obovate; leaves more than 5 cm. long, branchlets 



stouter, not contorted 23. C. conjuncta. 



Leaves narrowed at the base; fruit subglobose to slightly 



obovate 24. C. duracina. 



Mature leaves scabrate; fruit obovate 25. C. leeta. 



1. Crataegus angulata n. sp. 



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

 the young leaves. Leaves ovate to oblong-ovate, acuminate, rounded 

 or abruptly cuneate at the base, finally often doubly serrate, with 

 straight glandular teeth, and slightly divided into 4 or 5 pairs of 

 small acuminate lateral lobes ; more than half grown when the flowers 

 open at the end of May and then thin, light yellow-green, slightly 

 hairy above especially along the midribs and veins and rather paler 

 below, and at maturity thin, dark blue-green, smooth and lustrous on 

 the upper surface, pale bluish green on the lower surface, 4.5-6 cm. 

 long and 3.5-4 cm. wide, with thin midribs and primary veins; petioles 

 slender, occasionally glandular, with small mostly deciduous glands, 

 2-2.5 cm. in length ; leaves on vigorous shoots thicker, usually rounded 

 or truncate at the broad base, more coarsely serrate, deeply lobed and 

 often 6-7 cm. long and wide. Flowers 2.6 cm. in diameter, on long- 

 slender pedicels, in compact mostly 5-8-flowered corymbs, the lower 

 peduncles from the axils of upper leaves; calyx-tube narrowly obconic, 

 the lobes gradually narrowed from the base, short, slender, acuminate, 

 finely glandular-serrate near the middle or almost entire, reflexed 

 after anthesis; stamens 18-20; anthers rose color; styles 4 or 5. Fruit 

 ripening at the end of October, on slender pedicels, in pendant usually 

 3-5-fruited clusters, depressed-ovate, conspicuously pentagonal, flat- 

 tened at the apex, obtusely tapering at the base, light greenish yellow, 

 finally dark purplish red at least on one cheek, marked by large dark 

 dots, pruinose, becoming lustrous, 1-1.2 cm. long and 1.5-1.6 cm. wide; 

 calyx little enlarged, with a very short tube, a wide shallow cavity, 

 and small spreading lobes; flesh firm, dry and meal}', yellow slightly 

 tinged with red, acidulous; nutlets 4 or 5, acute at the ends, rounded 

 and slightly ridged or generally grooved on the back, 7-8 mm. long 

 and 4.5-5 mm. wide. 



A shrub 4-5 m. high, with stems sometimes 1 dm. in diameter, 

 covered with dark gray scaly bark, and slender only slightly zigzag 

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

 first appear, becoming dark chestnut brown and lustrous in their 

 first season and darker-colored the following } r ear, and armed with 

 stout straight or slightly curved purplish shining spines 2.5-3 cm. 

 long and persistent and becoming compound on old stems and branches. 



