676 REPORT OF STATE GEOLOGIST. 



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J. nodosum L. Knotted Rush. 



Found frequently in the northern counties, less frequently in the 

 southern part of the State. Frequents swamps and moist, gravelly 

 banks. 



Flowers in July and August. 



Noble (Van Gorder) ; Gibson (Schneck) ; Lake (Hill). 



J. Torreyi Coville. 



(J. nodosus megacephahis Torr.) 

 In swamps and wet, sandy soils in the northern counties of the 

 State. Usually associated with J. nodosus, from which it is not 

 always separated. 



Flowers in July and August. 



Tippecanoe (Cunningham) ; Jasper (Barnes) ; Fayette (Hessler) ; 

 Lake (Hill). 



J. scirpoides Lam. Scirpus-like Rush. 



Found throughout the State, growing in wet, sandy soils. Ap- 

 parently in greater abundance in the northern part of the State. 

 ^ Flowers in July and August. 

 Laporte (Hill) ; Jefferson. 



J. brachycephalus (Engelm.) Buch. 



(J. Canadensis brachycephalus Engelm.) 

 Found in the northern part of the State in considerable abundance. 

 Usually not separated from J. Canadensis, with which it is often 

 associated. 



Flowers in August and September. 

 Laporte. 



J. Canadensis J. Gay. 



Commonly found throughout the State,.but especially abundant in 

 the northern counties. 



Flowers in August and September. 



Shriner Lake (Deam) ; Steuben (Bradner) ; Laporte (Hill). 



J. acuminatum Michx. Sharp-fruited Rush. 



Found throughout the State in low, wet grounds; seems to grow 

 more vigorously in sandy soils. Abundant in all of its stations. 

 Flowers in May and June. 

 Vigo (Blatchley). 



