CYPERACEiE. 259 



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

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

 ocean. 



$. 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. Americanus. 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. 



$. 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 cyptrinum, 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 



