396 TREES OF NORTH AMERICA 



spreading teeth, when they unfold coated with hoary tomentum and often bright red, 

 nearly fully grown and covered with short soft pale hairs most abundant on the under 

 side of the thin midribs and 3 or 4 pairs of primary veins when the flowers open 



from the middle to the end of March, and at maturity thin and firm in texture, gla- 

 brous, dark green and lustrous above, paler below, 2'-2^' long and l^'-l^' wide; 

 their petioles slender, more or less winged toward the apex, at first tomentose, be- 

 coming glabrous or puberulous, ^'-f ' long; on vigorous shoots broadly ovate or oblong, 

 full and rounded or broadly cuneate at the base, very coarsely dentate, 5' long and 

 2^' wide. Flowers |' in diameter, on slender elongated pedicels, in broad slightly 

 villose 7 or 8-flowered corymbs; calyx-tube narrowly obconic, coated with long 

 matted pale hairs, the lobes narrow, acuminate, obscurely glandular-serrate or 

 nearly entire, villose on both surfaces; stamens 20; anthers small, dark red; styles 5, 

 surrounded at the base by a thin ring of hoary tomentum. Fruit ripening after the 

 1st of October, in spreading or drooping few-fruited clusters, subglobose and often 

 rather longer than broad, bright canary-yellow, marked by occasional dark dots, 

 J'-' long; calyx prominent, the lobes usually deciduous before the fruit ripens; flesh 

 thin, light yellow, rather dry but sweet and edible, nutlets 5, rounded and grooved 

 on the back, ' long. 



A tree, 20-25 high, with a tall straight trunk 8'-10' in diameter, numerous 

 ascending branches forming a handsome symmetrical round-topped head, and 

 branchlets covered when they first appear with matted pale hairs, soon glabrous, 

 and unarmed or occasionally armed with long thin gray spines. 



Distribution. Low rich woods near the banks of the Brazos River, Brazoria, 

 Texas. 



31. Crataegus Dallasiana, Sarg. 



Leaves oblong, acute, acuminate or rounded at the apex, gradually narrowed to 

 the concave-cuneate entire base, coarsely doubly serrate above, with straight glandu- 

 lar teeth, and usually slightly lobed above the middle, coated below with thick hoary 

 tomentum and villose above as they unfold, nearly fully grown and villose or tomen- 

 tose below when the flowers open early in April, and at maturity thin but firm in 

 texture, dark yellow-green, glabrous and lustrous on the upper surface, pale and 

 pubescent on the lower surface along the slender midribs and 3 or 4 pairs of thin 



