260 PLANTS OF MASSACHUSETTS. 



flowers terminal and lateral ; stem far more triangular, with long 

 leaves, rough on the margin ; in bogs. Plainfield ; found by Dr. 

 Porter. 



S. debilis. Pursh and Muhl. Grows along streams and in 

 ponds, 1-2 feet high, in tufts, without leaves, and its flowers 

 projecting some distance from the upper extremity ; Amherst, 

 Boston, and Berkshire County. 



S. lacustris, L. and Muhl., and $. acutus, Muhl., are large 

 plants, and, if different, much alike; 3-6 feet high, round, 

 tapering, rising out of ponds and lakes, often where the water is 

 several feet deep ; largest of the rushes ; the former called in 

 England bulrush ; used for making mats, for bottoms of chairs, 

 for a covering to floors, and for thatching ; stem full of pith, and 

 bearing flowers near its upper extremity. 



S. palustris. L. and Muhl. Grows in swamps and wet 

 places, variable stem, often 2 feet high, large or small ; common 

 also in Europe. 



5. olivaceus. A new species, named by Dr. Torrey, Eleo- 

 charis olivacea, Tor. " Mon. Cyp." p. 300, and " nearly allied" 

 to the preceding ; found in wet places of sandy soil, and usually 

 partly in the water, about a span high, often less, in dense tufts ; 

 pond in Tewksbury. B. D. Greene. 



Scleria. Gaertner. 19. 3. 



Monoecious ; glumes 2-6, and in the barren flower the paleae 

 are unarmed, and in the fertile are none ; stigmas 1 - 3 ; nut 

 colored. From the Greek for rough. 



6. triglomerata. Mx. Whip Grass. Three to four feet 

 high, 3-sided and rough, with almost winged angles, and leaves 

 about one third of an inch wide ; flowers on the side and at the 

 termination ; in swamps and low grounds ; Hadley. 



