352 TREES OF NORTH AMERICA 



albumen; seed-coat cartilaginous, chestnut-brown, and lustrous; embryo erect ; cotyle- 

 dons plano-convex, fleshy; radicle short, inferior. 



Malus is confined to North America, where four species occur, and to southeastern, 

 northeastern, and eastern Asia. Of exotic species, Malus Malus, Britt, the Apple- 

 tree, of uncertain origin, but probably a native of some of the countries of south- 

 western or central Asia, is now widely naturalized in northeastern North America. 

 Several of the species of eastern Asia and their hybrids are cultivated for their 

 handsome flowers, or for their fruits, the crab apples of the orchard. 



Malus is the classical name of the Apple- tree. 



CONSPECTUS OF THE NORTH AMERICAN SPECIES. 



Calyx-lobes persistent ; fruit depressed-globose, hollowed at the base, leaves convolute in 

 the bud. 

 Mature leaves glabrous or nearly so. 



Leaves oblong, lanceolate, or oval, acute at the base, crenulate-serrate or nearly 

 entire, subcoriaceous. 1. M. ailgustifolia (A, C). 



Leaves ovate, truncate or subcordate at the base. 2. M. coroiiaria (A). 



Mature leaves tomentose below, ovate to oblong, narrow at the base. 



3. M. loensis (A, C). 



Calyx-lobes deciduous ; fruit oblong, full and rounded at the base ; leaves ovate-lanceolate, 

 serrulate, often 3-lobed, conduplicate in the bud. 4. M. rivularis (B, G). 



I. Malus angustifolia, Michx. Crab Apple. 



Leaves lanceolate-oblong, acute or rounded and apiculate at the apex, acute at the 

 base, coarsely crenulate-serrate above the middle, or sometimes nearly entire, more 

 or less coated when they first appear with pale tomentum below and pilose above, at 

 maturity subcoriaceous, dark green and lustrous on the upper surface, paler and 



glabrous or nearly so on the lower surface, l^'-3' long, about I'-l^' wide, with slen- 

 der midribs and obscure primary veins; their petioles slender, rigid, glabrous or 

 puberulous, f'-l' long; stipules rose color, ' long. Flowers 1' in diameter, very 

 fragrant, on slender glabrous or hoary-tomentose pedicels I'-l^' long, in few-flow- 

 ered clusters; calyx-tube glabrous, pubescent or tomentose, the lobes narrow, acumi- 

 nate, with rigid tips, and hoary-tomentose on the inner surface; petals distinct, 



