ROSACES 399 



dentate stipules often 1' in length. Flowers \' in diameter, on slender elongated 

 pedicels, in broad loose many-flowered compound corymbs pubescent or puberulous 

 at first but soon glabrous; calyx-tube narrowly obconic, coated toward the base with 

 long matted pale hairs, the lobes narrow, acuminate, coarsely glandular-serrate, gla- 

 brous on the outer surface, villose on the inner surface; stamens 10; anthers small, 

 rose color; styles 2 or 3, surrounded at the base by a narrow ring of pale tomentum. 

 Fruit ripening early in October and remaining on the branches until November, 

 on elongated pedicels, in loose drooping many-fruited clusters, globose, bright scarlet, 

 slightly pruinose, marked by occasional large pale dots, about \' in diameter; calyx 

 prominent, with much enlarged coarsely glandular-serrate lobes, often deciduous be- 

 fore the fruit becomes entirely ripe; flesh thin, yellow, dry and mealy; nutlets 2 or 



3, thick and broad, rounded and conspicuously ridged on the back, with a prominent 

 grooved ridge, about \' long. 



A tree, occasionally 20 high, with a tall trunk 3'-7' in diameter, often armed with 

 long slender much-branched ashy gray spines, spreading branches forming a round- 

 topped symmetrical head, and branchlets occasionally slightly villose when they first 

 appear, soon glabrous, and furnished with numerous thin straight or slightly curved 

 shining chestnut-brown spines 2'-2^' long. 



Distribution. Open woods near the banks of small streams in the prairie region 

 of Stark and Peoria counties, Illinois. 



III. JBSTIVALES. 



34. Crataegus aestivalis, T. & G. May Haw. Apple Haw. 



Leaves elliptical to oblong-cuneiform, acute or rounded at the apex, gradually 

 narrowed and entire below, irregularly sinuate-toothed or angled above the middle, 

 or crenately serrate, with minute gland-tipped teeth, when they unfold covered above 

 with deciduous pale hairs and coated below with dense hoary tomentum rufous on 

 the midribs and veins, and at maturity subcoriaceous, dark green, lustrous, glabrous 

 or sometimes scabrate above and clothed below, especially along the broad midribs 

 and primary veins, with thick rusty pubescence, l^'-2' long and J'-l' wide; their 

 petioles at first rusty-tomentose, becoming pubescent, ^'-1' long; on vigorous shoots 



