IOWA CRAB. 313 
Plate 42. Pyrus ioensis. Lowa Crab. 
1. Flowering branch, one-half natural size. 2. Longitudinal section of 
flower with petals removed, natural size. 3. Fruiting branch, one-half 
natural size. 4. Longitudinal section of fruit, one-half natural size. 5. 
Summer branch, one-half natural size. 
