THE BOTANY OF THE ROUTE. 
45 
Reboulea Pennsylvania, Gray. 
Poa pratensis, Linn. 
POA CROCATA, Michx. 
Triticum repens, Linn. 
Elymus canadensis, Linn. 
Hordeum pusillum, Nutt. 
Hordeum jubatum, Ait. 
Panicum clandestinum, Linn. 
Panicum xanthophysum, Gray. 
Andropogon scoparius, Michx. 
Equisetum hyemale, Linn. 
Cistopteris fragilis, Bernh. 
Woodsia obtusa, Torr. 
Asplenium angustifolium, Pursh. 
Adiantum pedatum, Linn. 
Botrychium Virginicum, Swartz. 
