114 



Hood's pond ; Topsfleld, etc. Scarce ia many places. "Discovered 

 (1823) by Mr. Benj. D. Greene, growing plentifully in a pond at 

 Tewksbury" (Bigelow's Fl. Host., 2d ed., 1824). This was the 

 locality from which the species was originally described by Dr. 

 Bigelow. 



Junous acuminatus, Michx., var. legitimus. (Gray's Manual.) 

 Lanesville, West Newbury, etc. Often found bearing proliferous 

 heads. The typical form is not found here. 



Juncus articulatus, L. 

 West Newbury, Salem Great Pastures, and also at Wenham (W. 

 P. Conant). Pound on wet banlis. 



Juncus Canadensis, J. Gay, var. longicaudatus. (Gray's Man- 

 ual.) 

 A variable species. Moist places. Common. 



Var. eoarctatus. (Gray's Manual.) 

 In situations similar to the last. Common. 



PO]!TTEDERIACE.a!. 



(Pickerel-weed FAMiLy.) 



Pontederia cordata, L. (Pickerel- weed.) 

 Ponds and streams. Common. 



SchoUera graminea, Willd. 

 Pleasant and Wenham ponds, Wenham, and a few other localities, 

 but not yet noticed in flower. 



XYEIDACE^. 



(Ybllow-kyed-grass Family.) 



Xyris flezuosa, Muhl., Chapm. 



Shores of ponds. Not rare. 

 Var. pusilla. (Gray's Manual.) 



Crooked pond, Boxford ; Chebacco pond. Not so abundant as the 



last. 



ERIOCAULOWACE.ffil. 



(PiPEWORT Family.) 



Eriocaulon septangulare, WUhering. (Pipbwort.) 

 Common on the shores of ponds, and often in water two feet deep, 

 the stems lengthening to accommodate themselves to the increased 

 depth. 



