TOOTHACHE GRASS. MUSKIT. 61 



to fifty in number, forming a dense, oblong, purplish 

 cluster. It is found on salt and brackish marshes, be- 

 low high tide, especially southward. 



RUSH SALT GRASS (Spartina juncea) grows from one 

 to two feet high, stem slender, leaves narrow, rush-like, 

 and very smooth. It is common on salt marshes and 

 sandy sea-beaches, and flowers in August. 



SALT MARSH GRASS (Spartina stricta) grows from one 

 to three feet high, leafy to the top, and has from two 

 to four spikes. Glumes pointed, very unequal. Salt 

 marshes, Pennsylvania and South. 



ROUGH MARSH GRASS (Spartina glabra), a variety of 

 the last, is found commonly on the sea-coast from New 

 England southward, with stem and leaves rather longer 

 than the preceding, and spikelets from five to twelve, 

 crowded. 



SMOOTH MARSH GRASS (Spartina alterniflora), another 

 variety of salt-marsh grass, with spikes more slender, 

 three to five inches long. It has a strong and rancid 

 odor, and is common with the last. 



17. CTENIUM. Toothache Grass. 



Glumes persistent, lower one smaller, upper concave 

 below, with a stout awn bent like a horn on the back. 

 Flowers four to six, all neutral but one. Stamens three. 



TOOTHACHE GRASS ( Ctenium Americanum) rises from 

 three to four feet high, with a simple roughish stem ; 

 longer glume warty and awned. It is found in the wet 

 pine barrens of New Jersey, but is of no agricultural 

 value. 



18. BOUTELOUA. Gramma Grass. 



Spikes short, solitary, racemed ; spikelets alternate, 

 two to three flowered, the terminal flower imperfect. 



6 



