44 NEW YORK STATE MUSEUM 



3.5-4.5 wide, with thin midribs and primary veins; petioles slender, 

 slightly wing-margined at the apex, glandular, with minute scattered 

 glands, 2-2i cm in length ; leaves on vigorous shoots deltoid to rhom- 

 bic, thin, coarsely serrate, often 6-7 cm long and broad, with 

 slender wing-margined conspicuously glandular petioles. Flowers 

 on long slender pedicels, in 5-7-flowered compact corymbs, with 

 linear to linear-obovate glandular bracts and bractlets fading rose 

 color ; calyx-tube broadly obconic, the lobes gradually narrowed 

 from the base, slender, acuminate, entire or occasionally sparingly 

 dentate below the middle; stamens 10; anthers red; styles 2 or 3. 

 Fruit remaining hard and dry in the autumn, obovate, dark red, 

 marked by many large pale dots, pruinose, about i cm long and 

 8-9 mm wide; calyx prominent, with a long tube, a deep narrow 

 cavity, and spreading persistent lobes ; flesh thin, yellowish green ; 

 nutlets 2 or 3, rounded at the base, acute at the apex, ridged on the 

 back, with a low rounded ridge, light colored, 7-8 mm long, and 

 4-5 mm wide. 



A shrub, with slender nearly straight branchlets, olive-green 

 tinged with red when they first appear, becoming light chestnut- 

 brown and lustrous in their first season and ultimately dark gray- 

 brown, and armed with straight slender dark purplish spines 2.5-3 

 cm in length. 



Niagara Falls, J. Dunbar {j^ 3, type), October 7, 1902, and June 

 I, 1904. 



Crataegus congestiflora n. sp. 



Leaves ovate, acuminate, rounded or abruptly cuneate at the 

 entire base, finely doubly serrate above, with straight glandular 

 teeth, and slightly divided into 5 or 6 pairs of broad spreading 

 acuminate lateral lobes; more than half grown when the flowers 

 open during the last week of May and then membranaceous, light 

 yellow-green and covered above by short white hairs and pale bluish 

 green and glabrous below, and at maturity thin, dark blue-green, 

 dull and glabrous on the upper surface and paler blue-green on the 

 lower surface, 4-6 cm long and 3-4.5 cm wide, with thin yellow 

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

 gined at the apex, sparingly glandular, 1.5-2.5 cm in length; leaves 

 on vigorous shoots short-pointed at the apex, rounded at the broad 

 base, more coarsely serrate and more deeply lobed, about 6-7 cm 

 long and 5-6 cm wide. Flowers 1.4-1.5 cm in diameter, on slender 

 glabrous pedicels, in very compact mostly 4-6-flowered corymbs; 



