CRATAEGUS IN ROCHESTER, NEW YORK. 1 35 



Crataegus macracantha, Koehne. Sargent, Silva N. Am. xiii. 



147, t. 689. 



Sparingly on both sides of the Genesee River north and south of 

 Rochester, N. Y. 



Crataegus ferentaria, n. sp. 



Leaves rhombic to oval or obovate, acute, short-pointed or 

 rounded at the apex, gradually narrowed to the entire often unsym- 

 metrical base, sharply doubly serrate above, with straight gland- 

 tipped teeth, and slightly divided above the middle into numerous 

 small acute lobes ; more than half grown when the flowers open 

 and then very thin, dark yellow-green and slightly villose on the 

 upper surface particularly on the midribs, and lighter colored and 

 pubescent below along the midribs and principal veins ; at maturity 

 coriaceous, dark yellow-green, very lustrous and smooth above, pale 

 snd still puberulous below on the stout midribs, deeply impressed on 

 the upper side and often rose color on the lower side late in the 

 autumn and on the 6 or 7 pairs of slender primary veins extending 

 obliquely to the points of the lobes, 5.5-9 cm. long, 4-6 cm. wide ; 

 petioles stout, wing-margined at the apex by the decurrent bases of the 

 leaf-blades, deeply grooved, slightly villose early in the season, soon 

 glabrous, occassionally glandular, often rose color in the autumn, 

 1-2 cm. in length; on vigorous leading shoots leaves usually oval, full 

 and rounded or sometimes concave-cuneate at the base, mostly 

 abruptly short-pointed at the apex, often to cm. long and 7-8 cm. 

 wide. Flowers 1.5 dm. in diameter on slender pedicels, in wide 

 many-flowered thin-branched villose compound corymbs ; bracts and 

 bractlets narrow -obovate to linear, acuminate, glandular mostly 

 deciduous before the flowers open ; calyx broadly obconic, glabrous, 

 the lobes wide, acute, glandular-serrate, with large bright red glands, 

 glabrous on the outer, villose on the inner surface, spreading after 

 anthesis ; stamens 10 ; anthers pale yellow ; styles 2. Fruit on 

 elongated slender reddish pedicels, in broad lax drooping clusters, 

 subglobose to short-oblong, crimson, very lustrous, about 1-2 cm. 

 in diameter, marked by occasional large pale dots ; calyx prominent, 

 with a broad shallow cavity and much enlarged coarsely glandular- 

 serrate lobes, villose above, dark red toward the base on the upper 

 side, somewhat erect or spreading, usually persistent on the ripe fruit; 

 flesh, thick, yellow, sweet and succulent ; nutlets 2, rounded at the 

 obtuse ends, 6 mm. long and wide, ridged on the back, with a broad 



