382 MALACEAE 



Flesh of the pome without grit cells. 



Cymes simple; trees. 3. Malus. 



Cymes compound; shrubs. 4. Aronia. 

 Cavities of the ovary becoming twice as many as the styles. 5. Amelanchier. 

 Ripe carpels bony. 



Ovule 1 in each carpel, or if 2, dissimilar. 6. Crataegus. 



Ovules 2 in each carpel, alike. 7. Cotoneaster. 



i. Sorbus [Tourn.] L. 



Leaflets long-acuminate; fruit 4-6 mm. thick. I. 5. americana. 



Leaflets obtuse or short pointed; fruit about 8 mm. thick. 2. 5. scopulina. 



i. S. americana Marsh. In moist ground: Newf., Man., N. C, 



and Mich. 



Conn. Rare near the coast, increasing northwestward. 



N. Y. Unknown on L. I. and S. I., rare and local in northern West- 

 chester Co., thence increasing and becoming common northward. 



N. J. Sussex, Morris, Warren and Hunterdon counties. 



Pa. Wayne, Monroe, Carbon, Luzerne and Lehigh counties. 



Tertiary, o: Cretaceous, o: Older Formations, increasing north- 

 ward. South of the moraine only in Pa. 127-189 days. 800- 



3,365 ft. 



2. S. scopulina Greene. In moist ground: Lab. to Alberta, N. 

 Eng., Pa. and Mich. Also in the Rockies to N. Mex. and 

 Utah. 



N. Y. The highest mountains in Sullivan and Greene counties. 

 Pa. Luzerne Co. 



Tertiary, o: Cretaceous, 0: Older Formations, rare and local 

 northward. 1 17-123 days. Not south of the moraine. 1,800- 

 4,020 ft. 



Sorbus Aucuparia (L.) Ehrh. is recorded as an established escape in Conn, and 

 New York. I have seen no specimens of actually naturalized trees. 



2. Pyrus [Tourn.] L. 

 1. P. communis L. In thickets and woods, escaped from cultiva- 

 tion: Me. to N. J. and Pa. 

 A rare escape locally established. 



3. Malus Mill. 



Leaves glabrous, at least when mature. 



Leaves oblong, lanceolate or oval, narrowed at the base. 1. M. coronaria. 



Leaves ovate, cordate or rounded at the base. 2. M. glaucescens. 



Leaves persistently pubescent or tomentose beneath. 3. M. Mains. 



