256 



THE EVOLUTION OF OUR NATIVE FRUITS 



times. For example, Michaux left two specimens of 

 Pyrus angustifolia in his herbarium at Paris, one 



of which is ticketed Mains 

 angustifolia and the other 

 Mains coronaria, — the latter 

 said to grow in "Pennsyl- 

 vania et Virginia." 



Pyrus coronaria 

 and P. angustifolia 

 are essentially smooth 

 species, and the young 

 wood is dense and 

 hard. The young 



_ i leaves an d 



,/2 shoots are some- 

 Mimes thinly 

 / hairy, but they 

 soon become 

 smooth. The 

 western types are 

 essentially pubescent 

 species, and the 

 young growth is 

 thicker and softer ; 

 and the pubescence 

 is floccose or woolly, 



and persists npon the 



under surface of the 



Leaves throughout the 



season. 



■I. The prairie states crab {Pynfo Ioensis, Bailey, 

 Aline. Gard. xii. 47:>. Pyrus r<>r<>>\aria, var. Toensis, 

 Wood, CI. Bk. Botany, 383, 1800). Leaves rather 



Fig. i 



if I'll nis 



