AUSTRAL-AMERICAN REGIONS, 



83 



Triglochin (No. 4). Maritime ; growing in the salt-marshes. 



Juncus (No. 35) ; resembling J. maritimus. Growing in the salt-marshes. 



(No. 36); resembling J. acuminatus j articulated. On the river-bank, within 



reach of the infiltration. 

 Carex (No. 77). In the marshes, often where brackish. 

 (No. 78); perhaps a second species. 



Isolepis ? (No. 6 ; compare No. 5 Australia) ; resembling I. Savii. Small, with a single 



lateral spike. On the muddy shores of the river. 

 Scirpus lacustris ? (compare No. 1 Hawaiian Islands, Western Oregon, and California). 



In the marshes, often where brackish. 

 triqueter? (compare No. 13 Western Oregon, North California, and our Atlantic 



Coast). Growing in the salt-marshes, and perhaps strictly maritime. 

 Panicum? (No. 39); the florets woolly. Maritime; growing in the drifting sands of the 



sea-shore. The same species formerly collected by Baldwin at the mouth of the La 



Plata. 



Setaria (No. 5). On the Upland plain. (Perhaps not indigenous). 

 Aristida (No. 18) ; long-awned. On the Upland plain, and elsewhere. 

 Gen. near Aristida (No. 1). Much like a small slender Cenchrus ; membran. Growing 

 on the Upland plain. 



Agrostis ? (No. 27). Withered vestiges, having only the calyx-glumes remaining. On 

 the Upland plain. 



Nov. Gen. (No. 3); the American genus of grasses, wrongly referred to Polypogon, and 



resembling awned species of Agrostis. Growing on the Upland plain. 

 Phragmites (compare No. 1 Italy, Oregon, California, and our Atlantic States). In the 



marshes, often where brackish. No specimens. 

 (Deyeuxia ? No. 1). Donax-like ; conspicuous at a long distance from its tall silvery-white 



plume-like panicle; the spikelets two-flowered. On the drier portion of the marshes, 



towards the margin. 



Psamma? (No. 2). A grass much resembling P. arenaria. Maritime; growing in the 

 drifting sands of the sea-shore. 



Gen. Psamma-like (No. 1). Habit of Anthoxanthum. On the Upland plain. 



Spartina glabra ? (compare No. 2 North California, and our Atlantic Coast). Maritime ; 

 growing in the salt-marshes. 



( No. 5) ; normal. Maritime ; growing in the salt-marshes. 



Melica-like (No. 1) ; the margin of the florets ciliate. Maritime ; growing in the drift- 

 ing sands of the sea-shore. 



Ceratochloa (No. 1). On the margin of the Upland plain. 



Uniola spicata ? (compare No. X Oregon, California, and our Atlantic Coast). Maritime ; 



growing in the salt-marshes. 

 (No. 2); perhaps a second species; the florets two together in a spikelet, or 



even in some instances single. 



(Eragrostis) ; Megastachya (of Palis.). Perhaps introduced. 

 Lolium. Growing on the tract of sand-hillocks ; probably introduced. 

 Triticum vulgare, (bis New Zealand, Australia, Oregon, and our Atlantic States); wheat. 

 Said to be "cultivated near the town ; about twenty miles" from the mouth of the river. 



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