30 FLORA OF WORCESTER COUNTY. 



PONTEDERIACE^E (PICKEREL-WEED FAMILY). 



Pontederia L. Pickerel-weed, 

 cordata L. 



Margins of shallow ponds and streams, common. 



JUNCACE.E (RUSH FAMILY). 



Juncus (Tourn.) L. Rush, 

 bufonius L. 



Southbridge. Mr. R. M. Harper. 



tennis Willd. Very common in fields and roadsides. 



Greenei Oakes and Tuckerm. 



Brookfield. Mr. R. M. Harper. 

 eSusus L. Common Rush. 



Very common in moist ground, 

 brevicaudatus (Engelm.) Fernald. 



Princeton. W. W. B. and J. F. C. 

 canadensis J. Gay. Marshy places, common, 



pelocarpus Mey. 



Westminster. Miss M. B. White. 



militaris Bigel. In bogs and streams, Uxbridge. 



acuminatus Michx. Common, 



marginatus Rostk. In moist sandy places. 



Luzula DC. Wood Rush, 

 saltuensis Fernald. 



Mount Wachusett. 

 parviflora [Ehrh.] Desv. 



Mount Wachusett. 

 campestris (L.) DC., var. multiflora (Ehrh.) Celak. 



In woodlands, common. 



