A GUIDE AND KEY. TO AQUATIC PLANTS 81 



Giant Cane is evidently much less abundant. Phragmites communis 

 Trin., another large bamboo-like species, is found locally in our terri- 

 tory, mostly in brackish situations. It may be distinguished by its 

 wide, spreading leaves and its feathery inflorescence. 



2. A. iecta (Walt.) Muhl. Small Cane — More characteristically 

 Coastal Plain in distribution than the Giant Cane, very frequent in 

 moist places of many kinds but rarely present in any depth of water. 



2. Glyceria R. Brown 



G. sepientrionalis Hitchc. — Only representative of this primarily 

 aquatic genus which must be considered in our territory, not common. 

 It has been recorded from Alabama and South Carolina, and the 

 senior writer collected it on one occasion from a limesink in Coastal 

 Plain Georgia. 



3. Spartina Schreb. 



1. Spikes numerous, at least more than 10; inflorescence 1. S. spartinae. 



dense, cylindric. 

 1. Spikes fewer, not more than 10; inflorescence not dense. 2. S. bakeri. 



1. S. spariinae (Trin.) Merr. Cordgrass — Several species of this 

 genus occur in our territory but only this and the following species 

 are characteristically found in fresh water. In our territory it has 

 been collected near the coast in Florida and Mississippi where it 

 occurs in marshes and swamps. 



2. S. bakeri Merr. Cordgrass — Well distributed in Florida, found 

 less commonly near the coast in Georgia and further north; occurs 

 also in brackish water. 



4. Leersia Swartz 



1. Spikelets broadly oval, 3 to 4 mm. wide 1. L. lenticularis. 



1. Spikelets narrower, elliptic 2. 



2. Panicles narrow the branches ascending or ap- 2. L. hexandra. 



pressed. 



2. Panicles expanded, the branches spreading 3. L. oryzoides. 



1. L. lenticularis Michx. Catchfly-grass — Ranges over all our area, 

 found mostly along the larger rivers. 



2. Z. hexandra. Swartz. Cutgrass — Found by the writers mostly 

 in acid situations, range includes all of our Coastal plain. 



3. L. oryzoides (L.) Swartz. Rice Cutgrass — Most widespread and 

 abundant Leersia in our territory, frequently found in limesink ponds 

 in Georgia, may be found along rivers and probably elsewhere, range 

 includes all of our territory . 



5. Zizania L. 



Z. aquatica L. Wild rice — Not common in our territory, seen most 

 frequently in fresh-water marshes near the coast, but has been recorded 

 from every State in our range. 



