CYPERACEiE. 259 



-S. tuberculosus. Mx. A stiff plant without leaves, of a light- 

 green color ; Salem and Tewksbury, in sandy swamps near the 

 ocean. 



S. triqueter, L. and Mx. Has an acutely 3-sided culm, con- 

 cave on two sides, slender, 2-4 feet high ; a short leaf or two at 

 the base ; grows out of water, in ponds and marshes, fresh and 

 salt ; widely diffused ; pond on Taconic Mount, Berkshire Coun- 

 ty, Amherst, Boston. S. Jlmericanus. Pers. 



S. maritimus. L. Grows near the sea, or in brackish marshes, 

 1-3 feet high, with long and broad leaves, acute and rough on 

 the edge. -^ 



The last two are peculiar in their sharp 3-sided culm. The 

 last is eaten by cattle, and the dried roots have been used for 

 bread. Loudon. 



S. subterminalis. Torrey. From 1 to 3 feet high, its flowers 

 projecting near its top from the water, small and slender, with 

 long leaves, channeled at their base ; widely spread over the 

 State, but first found by Dr. Cooley of Deerfield, and sent to 

 Dr. Torrey. 



S. atrovirens, Muhl., and S. brunneus, Muhl., are two large, 

 stiff plants, with long leaves, growing in swamps and wet fields, 

 and bearing a large cluster of flower-heads, much alike, and yet 

 to be distinguished. 



S. eriophorum. Mx. Red Cotton-Grass. Named Tricho- 

 phorum cyp'rinum, by Persoon, on account of the hairs in its 

 flowers, and its resemblance to Cyperus ; a stiff, erect, rank 

 grass, 2-5 feet high, smooth and roundish, or obtusely triangular, 

 with long, narrow leaves, and bearing a large mass of flowers, 

 umbel-like, nodding, and underpropped by several long and stiff 

 leaves ; common in swamps and pools, and in rich muddy bottoms 

 and banks ; cattle do not eat it. 



S. lineatus. Mx. A smaller plant than the preceding, with 



