114 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Heteranthera dubia (Jacq.) MacM. (doubtful). 

 Hcteranthera graminea Vahl. 

 Water Star Grass. 



Rare or local. Shallow water of larger rivers, such as the 

 Connecticut and Housatonic, or sometimes in ponds. July — 

 Sept. 



EICHHORNIA Kunth. 



Eichhornia crassipes (Martins) Solms (thick-stemmed). 

 Water Hyacinth. 



Rare. A few plants were found in the Pequonnock River, 

 Bridgeport (C. K. Averill, 1893). June — Aug. Fugitive 

 from Brazil. 



The plant is not hardy in this climate, but in Florida it has 

 multiplied in the St. John's river system to such an extent as 

 seriously to obstruct navigation. 



JUNCACEAE. RUSH FAMILY. 



JUNCUS L. Rush. Bog Rush. 



Juncus bufonius L. (of toads). 



Toad Rush. Toad Grass. Frog Grass. 



Frequent to common. Open, moist, sandy places. Fruit 

 mid-June — Aug. 



Juncus Gerardi Loisel. 

 Black Grass. 



Common on salt marshes and meadows along the coast. 

 Fruit June — Aug. 



Is valued for fodder and constitutes much of the salt hay 

 cut by farmers. 



Juncus tenuis Willd. (slender). 

 Yard Rush. Slender Rush. 



Common. Fields, pastures, open woods, roadsides and 



paths, in either dry or moist ground. Fruit mid- June — Sept. 



This species is said to be readily eaten by stock, and when 



made into hay to contain 7% crude protein. 



Juncus tenuis W^illd., var. anthelatus Wiegand (having a cyme 



with lateral branches overtopping the central ones). 



Rare. Low sandy or grassy places : Southington (Andrews 



