IOWA ACADEMY OF SCIENCES. 



129 



pedicels are much stouter, tomentose, and the calyx is densely 

 tomentose on the outside. 



Fruit collected and described at Ames, Iowa. Size variable, 

 large type one and three-eighths inches by one and three-eighths 

 inches or one and one-half inches, small type five-eighths of an 

 inch by seven-eighths of an inch; form exceedingly variable, 

 spherical-pyriform, spherical to oval, usually markedly 

 truncate at calyx end; color green, turning to a light yellow, 

 sometimes slightly flushed on sunny side; skin slightly rough- 

 ened, greasy, thickly dotted with small gray spots; cavity 

 most constant character of all, small, narrow, shallow, stem 

 three-eighths of an inch to one and one- eighth of an inch, 

 slender, thickened at base and extremely tomentose; basin, 

 well marked corrugations, sometimes deep and broad, some- 

 times scarcely concave, lined with dense tomentum; calyx 

 prominent, closed; flesh greenish- white, hard, brittle; flavor 

 sharp, astringent, acid; texture fine grain but fibrous; core 

 rather large, clearly separated from flesh; seed plump, dark, 

 or light brown; with or without a slight beak, oval in outline, 

 flat on side of contact; season winter. General notes: Fruit 



a^ 



Fig. 7. Fruit of P. lowemls, showing variation In form of basin, 

 a, shallow; b, medium; c, broad, deep. 



shows remarkable variations in form but the character of 

 the flesh and seed cavities seem to be constant throughout. 



