ROSACEA 



453 



84. Crataegus sertata, Sarg. 



Leaves oblong-ovate, acuminate, rounded, truncate, subcordate or rarely cuneate 

 at the broad base, finely and often doubly serrate, with straight gland-tipped teeth, 

 and deeply divided into 5 or 6 pairs of wide acuminate lobes, when they unfold 

 coated above with short pale hairs and villose below on the midribs and veins, about 



half grown and villose when the flowers open during the first half of May, and at 

 maturity membranaceous, dark yellow-green and scabrate on the upper surface, 

 pale yellow-green and glabrous on the lower surface, 2^-3' long, l^'-2' wide, with 

 thin yellow midribs and slender primary veins arching obliquely to the points of the 

 lobes; their petioles slender, slightly grooved, villose early in the season, ultimately 

 glabrous, sparingly glandular, l^'-3' long. Flowers f '-1' in diameter, on slender 

 pedicels, in broad 10-lo-fiowered compound densely villose corymbs, with linear to 

 linear-obovate glandular large and conspicuous caducous bracts and bractlets; calyx- 

 tube broadly obconic, glabrous above, villose below, the lobes abruptly narrowed 

 from the base, broad, acuminate, tipped with small red glands, coarsely glandular- 

 serrate, glabrate on the outer, pubescent on the inner surface; stamens 5-10, usually 

 5; anthers pale rose color; styles 3-5, surrounded at the base by tufts of pale hairs. 

 Fruit ripening about the middle of September and soon falling, on slender villose or 

 pubescent pedicels, in drooping many-fruited clusters, subglobose to slightly obo- 

 vate, full and rounded at the ends, bright red and lustrous, becoming darker or 

 crimson when fully ripe, marked by occasional large pale dots, about ^' long and 

 wide; calyx prominent, with enlarged mostly erect incurved serrate lobes; flesh thin, 

 yellow, aromatic, pleasantly acid; nutlets 3-5, usually 4, thin, narrow and acute at 

 the ends, slightly ridged on the back, with a wide or narrow ridge, -|' long. 



A tree, 10-20 high, with a trunk 6'-8' in diameter, and often 4-5 long, 

 covered with close dark gray bark separating into long narrow thin plate-like scales, 

 stout spreading branches forming a handsome open head, and slender nearly straight 

 branchlets thickly coated when they first appear with matted pale hairs, light brown 

 and lustrous at the end of their first season, and dark gray-brown the following year, 

 and unarmed or armed with stout nearly straight or curved spines l'-2^' lo"g- 



Distribution. Open woods and pastures in rich moist soil; northeastern Illinois, 

 Barrington, Mokena, Glendon Park, and Lake Zurich. 



