492 



TREES OF NORTH AMERICA 



glands, finely glandular-serrate, glabrous on the outer, pubescent on the inner surface; sta- 

 mens 10-20, usually 10: anthers pinkish purple; styles 4 or 5, surrounded at base by tufts 

 of pale hairs. Fruit ripening from the loth to the 20th of September, and usually falling 

 about the 1st of October, on short glabrous pedicels, in drooping few-fruited clusters, 

 short-oblong to slightly obovoid, dull red to crimson, '-f long, about |' wide; calyx 

 sessile, with spreading closely appressed serrate usually persistent lobes; flesh thin, pale 

 yellow or nearly white, acidulous; nutlets 4 or 5, broad, narrow and acute at the ends, 

 prominently ridged on the back with a high narrow ridge, or often grooved, about |-' long. 



A tree, sometimes 25 high, with a trunk 2'-6' in diameter and often 6-9 long, covered 

 with close dark gray bark, ascending branches forming an oblong, open head, and slender 

 branchlets light orange-yellow and covered when they first appear with long scattered 

 caducous white hairs, becoming bright red-brown and lustrous, and dark gray-brown the 

 following year, and armed with many stout usually slightly curved bright red-brown 

 shining spines, l'-l|' long. 



Distribution. River banks and low woods in rich soil; northeastern Illinois (Ley den 

 township, La Grange, Thatcher's Park, Cook County, Highland Park, Deerfield, Wau- 

 conda, Lake County); Fox Point, Milwaukee County, Wisconsin. 



97. Crataegus Pringlei Sarg. 



Leaves oval, acute, rounded or often abruptly narrowed and cuneate at base, occasion- 

 ally irregularly lobed above the middle with short broad acute lobes, and coarsely and often 

 doubly serrate with glandular teeth, as they unfold villose on both surfaces, and often 



Fig. 449 



more or less tinged with red, when the flowers open, usually in the last week of May, 

 roughened above by short closely appressed pale hairs and glabrous below with the excep- 

 tion of a few hairs on the slender midrib and remote primary veins, and at maturity thin, 

 glabrous, and bright yellow-green on the upper surface, pale below, 2'-2|' long, and If '-2j' 

 wide, usually conspicuously concave by the gradual turning down of the blades from the 

 midrib to the margins, drooping on long thin slender glandular petioles at first villose, 

 ultimately glabrous, I'-lf in length; leaves at the end of vigorous shoots sometimes 

 truncate or slightly cordate at the base, and frequently 3' long and wide. Flowers about 

 f ' in diameter, on stout hairy pedicels, in many-flowered compound villose corymbs; calyx- 

 tube narrowly obconic, villose, particularly toward the base, the lobes narrow, acuminate, 

 coarsely glandular-serrate, villose on both surfaces or only on the inner surface; stamens 

 10, occasionally 5-10; anthers small, purple; styles 3-5, surrounded at the base by con- 



