94 ROCHESTER ACADEMY OF SCIENCE. 



§ CRUS-GALLI. 



Fruit medium size, red, often slightly pruinose ; nutlets i-j, obtuse, 

 prominently ridged on the back ; corymbs many-Jlo'caered ; stamens 

 10-20; anthers rose color; leaves subcoriaceous, dark green and 

 histrous. 



Glabrous ; leaves obovate-cuneiform to broadly ovate, their 

 primary veins within the parenchyma ; stamens 10 ; 

 nutlets 2. I.e. Crtis-galli. 



Slightly villose ; leaves oblong-obovate to oval, their veins 

 without the parenchyma, prominent ; stamens 10-20 ; 

 nutlets 1-2. 2. C. pe7'similis. 



Crataegus Crus-galli, Linnaeus. Sargent, Silva N. Am., iv. 91, 

 t 128. Common. 



Crataegus persimilis, n. sp. 



Leaves oblong-obovate to oval, acuminate, narrowed and short- 

 pointed or rarely rounded at the apex, gradually contracted from near 

 the middle and cuneate at the narrow entire base, sharply and doubly 

 serrate above, with glandular teeth ; nearly fully grown when the 

 flowers open and then thin but firm in texture, glabrous with the 

 exception of a few caducous pale hairs on the upper side of the base 

 of the midribs, dark green and lustrous above and light orange-green 

 below ; at maturity coriaceous, lustrous on the upper surface, dull and 

 whitish on the lower surface, 4-6.5 cm. long, 2-3 cm. wide, with thin 

 midribs and slender but prominent primary veins, dark orange colored 

 early in the season, becoming pale yellow ; petioles slender, wing- 

 margined sometimes to the middle by the decurrent base of the leaf- 

 blades, grooved, occasionally grandular, with minute scattered glands, 

 at first sparingly villose, soon glabrous, 0.8-1.5 cm. in length ; 

 stipules linear, acuminate, furnished on the margins with minute 

 glands, long, caducous. Flowers about 1.2 cm. in diameter on long 

 slender slightly villose pedicels, in broad many-flowered thin-branched 

 corymbs ; bracts and bractlets linear, acuminate, glandular, mostly 

 persistent until the flowers open ; calyx-tube narrowly obconic, gla- 

 brous, the lobes long, slender, acuminate, coarsely glandular-serrate 

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

 anthesis ; stamens 10-20; styles 2, rarely i, surrounded at the base 

 by a narrow ring of pale tomentum. Fruit on slender reddish pedicels 

 in few-fruited drooping clusters, oblong to subglobose, full and 



