1921] SARGENT, NOTES ON NORTH AMERICAN TREES, IX. 7 



A tree 4.5-5 m. high, with a trunk 20 cm. in diameter, covered with 

 pale gray scaly bark, wide-spreading branches forming a round-topped 

 head and stout branchlets slightly pilose when they first appear, becom- 

 ing glabrous, orange-brown or dark reddish brown in their second year, 

 and armed with many stout straight purple spines 3.5-5 cm. in length, 

 becoming compound and much elongated on the trunk and large branches. 



Arkansas. Carroll County, rocky hillsides near Eureka Springs, E. J. 

 Palmer, No. 4451 (3), September 23, 1913, No. 5520 (3), May 9, 1914 (type). 



This species is most closely related to Crataegus f era Beadle of western 

 Louisiana, from which it differs in its much broader and thicker leaves, 

 without the hairs of that species on their upper surface early in the sea- 

 son, in its slightly pilose not densely villose corymbs and in the glabrous 

 calyx-tube. 



§Molle 



Leaves 



rounded at base, finely double serrate usually to the base with acuminate 

 callous tipped teeth, and slightly lobed above the middle with short tri- 

 angular lobes; when they unfold coated above with short white hairs 

 and densely tomentose below, and at maturity thin, glabrous above, 

 slightly pubescent below on the slender midrib and primary veins, 5-6 

 cm. long and 3.5-4 cm. wide; petioles slender, densely tomentose when 

 they first appear, becoming glabrous or puberulous 1.5-2.5 cm. in length. 

 Flowers opening toward the end of April, in mostly 5-10-flowered small 

 corymbs densely covered, like the pedicels and calyx-tubes, with long 

 matted white hairs; calyx-lobes gradually narrowed from the base, slen- 

 der, acuminate, laciniately glandular-serrate, villose, more densely on 

 the outer than on the inner surface; stamens 10; anthers yellow; styles 

 usually 3. Fruit ripening early in September, globose, scarlet, 1.5-1.7 

 cm. in diameter; nutlets usually 3, acute at base, broad and rounded at 



apex, 5 or 6 mm. long, 4-5 mm. wide. 



A tree 6-7 m. tall, with a short trunk covered with furrowed bark, 

 spreading branches forming a round-topped head, and stout branchlets 

 thickly covered when they first appear with long matted white hairs, 

 soon glabrous, dull reddish brown during their first season, becoming 

 dark gray-brown and armed with occasional slender nearly straight spines 



3-4 cm. in length. 



Arkansas. MarionCounty, glades among rocks in open woods, E. J. 

 Palmer, No. 8419 (6), September 1, 1915 (type), Baxter County, near Cotter, 

 No. 17238 (6), April 18, 1920. 



Missouri. McDonald County, Noel, E. J. Palmer, No. 4083, September 

 2, 1913; B. F. Bush, No. 7481, April 22, 1915; Stone County, near Galena, E. 

 J. Palmer, No. 17236, April 18, 1920. 



In the Molles Group the only species with leaves cuneate at base and 

 flowers with 10 stamens and yellow anthers which has been described is 

 (!. subrnollis Sargent of eastern Canada and eastern Maine and Massa- 



