142 FLORA OF THE UPPER SUSQUEHANNA. 



ISOETACE/C. 



ISOETES L. 



I. Engelmanni A. Br. Along the river at Apalachin, Fejino. 

 Along the Susquehanna in gravelly soil, city of Binghamton, 

 Chite. Elsewhere not reported. Plant sedge-like in appear- 

 ance, and difficult to distinguish from the vegetation amid 

 which it grows. 



I. Engelmanni gracilis Engelm. Found with the type m very 

 wet, shady places. Leaves few and very slender. 



