48 CATALOGUE OF PLANTS. 



Order 93. NAIADACE-SJ. Pondweed Family. 



Scheuchzeria, L. 



S. palustris, L. Cranberry Pond on Grantham Mt., N. H. ; Waterman's- 



Pond near Union Village, Vt. ; etc. ; Jesup. 

 Potamogeton, Tourn. Pondweed. 

 P. natans, L. Ponds and streams. 



P. Oakesianus, Robbins. Cranberry Pond on Grantham Mt. 

 P. Pennsylvanicus, Cham. (P. Claytonii, Tuckerm.) Common in ponds 



and streams. 

 P. Spinllus, Tuckerm. Streams and ponds. 

 P. hybridus, Michx. Shallow ponds. 

 P. rufescens, Schrad. Windsor, Vt. ; infrequent. 

 P. fluitans, Roth. (P. lonchites. Tuck.) Conn, river; common. 

 P. amplifolius, Tuckerm. Ponds and large rivers. 

 P. heterophyllus, Schreb. (P. gramineus, Fries.) Conn, river; common 



and variable. 

 P. perfoliatus, L. Conn, river ; common. 



var. lanceolatus, Robbins. Conn, river. 

 P. zosteraefolius, Schum. (P. compressus. Fries.) Randolph, Vt., J. W. 



Freley ; Fairlee Pond, Vt. ; George Pond, Enfield, N. H. 

 P. pauciflorus, Pursh. Pools. 

 P. pusillus, L. Shallow pools; not rare. 



P. Tuckermani, Robbins. Claremont, Dr. Barrows ; scarce. 

 P. pectinatus, L. In Conn, river ; abundant. 

 P. Robbinsii, Oakes. Mascoma Creek near West Lebanon, and George: 



Pond, Enfield, N. H.; Fairlee Pond, Vt. Common. 



[Other species than the above are probably within our limits.] 

 Zannichellia, Micheli. Horned Pondweed. 



Z. palustris, L. Ponds. Clzxemont, Dr. Barrows ; scarce. 

 Naias, L. Naiad. 



N. flexilis, Rostk. & Schmidt. Ponds ; rather common. 



Order 94. ERIOCAULEJE. Pipewort Family. 



Ericaulon, L. Pipewort. 



E. septangulare, With. Sandy borders of ponds ; common. 



Order 95. CYPERACEJE. Sedge Family. 



Cyperus, Tourn. Galingale. 



C. diandrus, Torr. Low ground, and variable. 



C. aristatus, Rottb. (C. inflexus, Muhl.) Shores of Conn, river. 



C. filiculmis, Vahl. Dry, sterile soil ; common. 



C. dentatus, Torr. Margins of ponds. 



C. esculentus, L. (C. phymatodes, Muhl.) Low ground, spreading by 



root-like tubers. 

 C. strigosus, L. Very common. 



