of Mississippi and Louisiana 85 



Naiadaceae 



f Ruppia maritima L. Common in brackish ponds 



* 



SCHEUCHZERIACEAE 



Triglochin striata R. & P. Common in mouths of bayous 



on the larger islands. 



Alismaceae 



Sagittaria graminea cycloptera J. G. Smith. Ship Island, on 

 margin of pond. 



5. lancifolia L. On marshy ground, South Pass. 



Gramineae 



Andropogon Elliottii Chapm. Occasional on dry knolls on the 

 larger islands. 



A. glome rat us Walt. Rather common on margins of ponds on 

 sandy islands. 



A. maritimus Chapm. Common on drifting sands only. 

 Florida to Mississippi on the coast. 



fA. Virginicus L. Occasional on Cat and Breton Islands. 



Michx. Ship and Cat Islands. 



A. gracilis Ell. In one locality on Cat Island. 



A. lanata Poir. Occasional in dry woods, Cat Island. 



fA. purpurascens Poir. On dry sandy soil, somewhat remote 

 from the beach on Cat Island. 



A. spiciformis Ell. On sandy marsh, Ship Island. 



*Capriola Dactylon (L.) Kuntze. Abundant everywhere ex- 

 cept on the muck marshes and high dunes, very abundant on the 

 mud lumps. Introduced. 



Cenchnts incertus M. A. Curtis. Abundant on sandy soils, 

 and the most common species of the genus. A pine barren grass. 

 Southern Jersey southward. 



C. megacephalus Doell. Abundant just above the tide line on 

 all sandy beaches, but not found elsewhere. 



fC. tribuloides L. Common on sandy islands. 

 Chtoris petraea Sw. Common in the interior oi all sandy 

 islands. 



WXpUtckne fascicularis (Lam.) Beauv. On low, wet sandy 

 b arrens, Ship and Cat Islands. 



