414 



TREES OF NORTH AMERICA 



coriaceous, dark green, lustrous and scabrate above, pale below, and pilose on both sur- 

 faces of the slender midrib and obscure primary veins and veinlets, l'-lf long, and 

 s'-l' wide; petioles glandular, villose when they first appear, soon glabrous, usually about 

 \' in length. Flowers f in diameter, on slender pedicels, in broad loose 8-11-flowered vil- 

 Ipse corymbs; calyx-tube narrowly obconic, villose or nearly glabrous, the lobes narrow, 

 acuminate, entire, glabrous on the outer surface, usually puberulous on the inner surface; 

 stamens 10; anthers small, rose color; styles 2 or 3. Fruit ripening early in November, on 

 slender pedicels, in drooping many-fruited glabrous clusters, globose or short-oblong, bright 

 orange-red, with a yellow cheek, about \' in diameter; calyx prominent, with large spread- 

 ing lobes usually deciduous before the fruit ripens; nutlets 2 or 3, thick, with a broad 

 rounded ridge, \' long. 



A tree, 15-20 high, with a trunk 5'-6' in diameter, wide-spreading usually horizontal 

 branches forming a low flat-topped or rounded head, and branchlets covered with long 

 pale hairs when they first appear, soon glabrous and bright red-brown, becoming gray or 

 gray tinged with red during their second year, and armed with numerous stout straight 

 or slightly curved spines l|'-2f long. 



Distribution. Dry limestone slopes and ridges; common near Allenton and Pacific, 

 St. Louis and Franklin counties, Missouri; near Eureka Springs, Carroll County, Arkansas. 



16. Crataegus montivaga Sarg. 



Leaves obovate to oval, rhombic or suborbicular, rounded, acute or acuminate or ab- 

 ruptly short-pointed at apex, coucave-cuneate at base, and sharply coarsely serrate usually 



Fig. 368 



to below the middle with straight acuminate glandular teeth, covered above with short 

 white hairs and glabrous below when they unfold, and at maturity dark green, lustrous 

 and scabrate above, pale yellow-green below, l'-lf long, and f'-l' wide, with a slender 

 midrib and prominent primary veins; petioles slender, villose early in the season, becom- 

 ing glabrous, about \' in length. Flowers opening late in April, about |' in diameter, on 

 villose pedicels \'-% long, in compact mostly 7-10-flowered villose corymbs, their bracts 

 and bractlets linear-obovate, conspicuously glandular-serrate; calyx-tube broadly obconic, 

 glabrous or with occasional hairs near the base, the lobes gradually narrowed from a wide 

 base, glandular-serrate, sometimes laciniate near the acuminate apex, glabrous on the 

 outer surface, villose on the inner surface; stamens 10-15, usually 10; anthers pink; styles 

 2 or 3. Fruit ripening late in September or in October, on erect nearly glabrous or vil- 

 lose pedicels, short-oblong to ellipsoid, orange-red, about \' long; the calyx enlarged and 

 conspicuous; flesh thin, yellow-green; nutlets 2 or 3, rounded at apex, with a low broad 

 rounded ridge, about j' long. 



A bushy tree, rarely more than 12-lo high, with a short trunk 10'-12' in diameter, erect 



