380 



TREES OF NORTH AMERICA 



Leaves on flowering branchlets, acute or acuminate, serrate. 



Leaves at the end of vigorous shoots distinctly lobed, those of flowering branchlets 



incisely serrate or lobed. 



Leaves subcordate, with the lowest pair of veins springing directly from the base, 



light green on the lower surface. 1. M. glabrata (A). 



Leaves truncate or rounded at base, the lowest pair of veins at some distance from 



the base. 



Leaves glaucescent beneath, thickish at maturity. 2. M. glaucescens (A, C). 

 Leaves light green on the lower surface, thin. 3. M. coronaria (A, C). 



Leaves at the end of vigorous shoots only slightly lobed, those of flowering branch- 

 lets serrate. 



Leaves oval-elliptic, acute; fruit much depressed, distinctly broader than high. 



4. M. platycarpa (A, C). 



Leaves lanceolate, acuminate, thin; fruit subglobose. 5. M. lancifolia. 



Leaves on flowering branchlets usually rounded at apex, those at the end of vigorous 



shoots only slightly lobed; fruit subglobose. 6. M. angustifolia (A, C). 



Leaves tomentose or villose at maturity, at least those of vigorous shoots, strongly 



veined. 



Calyx glabrous on the outer surface; leaves of flowering branchlets without lobes, gla- 

 brous or nearly so. 7. M. bracteata (A, C). 

 Calyx tomentose or pubescent on the outer surface; leaves usually incisely lobed, 

 pubescent or tomentose beneath, rarely glabrous. 8. M. ioensis (A, C). 

 Calyx deciduous from the yellow or reddish fruit without a waxy exudation; leaves of vig- 

 orous shoots often 3-lobed at apex; anthers yellow (Sorbomalus). 



9. M. fusca (B, G). 



1. Malus glabrata Rehd. Crab Apple. 



Leaves triangular-ovate or ovate, acute or acuminate at apex, cordate or rarely truncate 

 at base, lobed with 2 or 3 pairs of short-acute or short-acuminate coarsely serrate lobes, 



Fig. 337 



when they unfold bronze color and sparingly covered with caducous hairs, glabrous when 

 fully expanded, and at maturity dark yellow-green and lustrous above, pale below, 2|'-3' 

 long and 2'-2|' wide, with 5-7 pairs of prominent primary veins, the lowest pair from the 

 base of the leaf; petioles slender, glabrous, t'-lj' in length; leaves at the end of vigorous 

 shoots more deeply lobed and often 4' long and 3%' wide. Flowers about 1 \' in diameter, 



