126 ROCHESTER ACADEMY OF SCIENCE. 



Crataegus matura, Sargent, Rhodora, iii. 24 (in part) 1901 ; v. 

 144. 



Rochester; common in rich soil in Monroe and Orleans counties, 

 J. Dunbar, May and August, 1901, August, 1902. 



Crataegus Dunbari, ;/. sp. 



Leaves ovate to oval or suborbicular, acute or acuminate, rounded 

 or rarely cuneate at the entire base, sharply doubly serrate above, with 

 straight or incurved teeth tipped with large dark glands, and slightly 

 divided above the middle into short spreading acute lobes; when they 

 unfold slightly tinged with red and roughened by short white hairs, 

 and more than half-grown when the flowers open and then very thin, 

 dark yellow-green and scabrate on the upper surface, and pale yellow- 

 green on the lower surface; at maturity becoming thick and firm in 

 texture, dark olive-green and smooth or still slightly rough above, 

 light yellow-green below, 5-6 cm. long, 4-6 cm. wide, with slender 

 yellow midribs and 4 or 5 pairs of primary veins deeply impressed on 

 the upper side; petioles stout, wing-margined at the apex, grooved, 

 sparingly glandular, i 5-2.5 cm. in length. Flowers 1.6 cm. in 

 diameter on long slender slightly hairy pedicels, in compact usually 

 10 to 14-fiowered thin-branched compound corymbs; calyx-tube 

 broadly obconic, glabrous, the lobes separated by wide rounded 

 sinuses, slender, acuminate, coarsely glandular-serrate below the 

 middle, glabrous on the outer, villose on the inner surface, reflexed 

 after anthesis; stamens 10; anthers rose color ; styles 3 or 4, surrounded 

 at the base by a broad ring of pale tomentum. Fruit on stout reddish 

 pedicels, in drooping many-fruited clusters, subglobose but often 

 rather broader than long, crimson, lustrous, marked by minute dark 

 dots, from 1.2 to 1.4 cm. in diameter; calyx small, with a very short 

 tube, a narrow shallow cavity, and reflexed closely appressed lobes, 

 gradually narrowed from broad bases, glandular-serrate below, entire 

 above the middle, dark red-brown on the upper side toward the base, 

 their tips often deciduous from the ripe fruit ; flesh nearly white, thin, 

 sweet, dry and mealy ; nutlets 3 or 4, thin, acute at the ends, obscurely 

 ridged and sometimes slightly grooved on the rounded back, 7 mm. 

 long. 



A round-topped shrub from 3-4 m. tall and broad, with numerous 

 stout intricately branched spreading stems and slender nearly straight 

 branchlets, marked by few small pale lenticels, light olive-green during 



