152 Proceedino^s of the Oliio State Academy of Science 



1. Leaves glabrous, at least when mature. 2. 



1. Leaves persistently pubescent or tomentose beneath. 3. 



2. Leaves oblong, oval, or lanceolate, narrowed at the base. M. angus- 



tifolia. 

 2. Leaves ovate, rounded or cordate at the base, often somewhat lobed. 

 M. coronaria. 



2. Leaves ovate, acute or acuminate at the apex and acute at the base. 



on slender petioles; finely and nearly evenly serrate. M. baccata. 



3. Leaves mostly narrowed at the base; pome 1-2 in. in diameter. 4. 



3. Leaves rounded or cordate at the base; pome usually large, '2-4 in. 



in diameter. M. malus. 



4. Pedicel slender, pubescent, 1-2 in. long. M. iocnsis. 



4. Pedicel stout, white-tomentose, -J--1 in. long. M. soidardi. 



1. Malus angustifolia (Ait.) Mx. Narrowle.af Crab-apple. 

 A small tree usually with thorn-like stunted branches or spurs. 

 Leaves oblong, oblong-lanceolate, or oval, thick, shining above, 

 sometimes pubescent beneath when young, dentate or often entire. 

 On low ground. .V. J. to 111., Kan., Fla., La., and Ohio. 



2. Malus coronaria ( L. ) ^\\\\. l-'ragrant Crab-apple. A 

 small tree with hard and sour fruit suitable for preserving. 

 Leaves ovate, to triangular-ovate, sparingly pubescent beneath 

 when young, sharply serrate and often somewhat lobed. On low 

 ground. C)nt. to Mich., and S. Car., Ohio. 



3. Malus ioensis (A\'ood) iiritt. Iowa Crab-apple. A 

 small tree mttch resembling AI. coronaria. Leaves ovate, oval, or 

 oblong, dentate, crenate or with a few rounded lobes, white-pu- 

 bescent beneath at length glabrous above. Minn., Wis., and 111. 

 to Neb., Ky., La., and Okl. 



4. Malus soulardi (Bail.) Britt. Soulard Crab-apple. A 

 small tree resembling the two preceding. Leaves ovate, elliptic 

 or obovate, irregularly crenate-dentate or sometimes few-lobed. 

 rugose and densely tomentose beneath. Minn, to Mo. and Tex. 



-'-. Malus baccata (L.) Siberian Crab-apple. A small 

 spreading tree with compact crown. Pedicels very slender; fruit 

 small, not becoming mellow. Cultivated. 



5. Malus malus (L. ) Britt. Common Apple. A medium- 

 sized tree with spreading branches. Leaves ovate or oval, glab- 

 rous or nearly so above, pubescent and often w^oolly beneath. 



