90 PUBLIC HEALTH BULLETIN NO. 2 86 



2. E. equisetoides (Ell.) Torr. Knotted Spikerush — Chiefly 

 Coastal Plain, should occur over most of our territory. In Georgia 

 most often seen in acid, open ponds. 



3. E. quadrangulata (Michx.) R. & S. Square-stemmed Spikerush — 

 Ponds and marshes, chiefly Coastal Plain. Not definitely recorded 

 from Florida, Alabama, or Mississippi, but may occur in these as well 

 as our other states. In Georgia found mostly along the coast but at 

 least one inland station, a grassy limesink, was observed. 



4. E. robbinsii Cakes — Occurs widely on the Coastal Plain over all 

 of our territory, observed by the senior writer mostly in acid, open 

 limesink ponds. 



5. E. cellulosa Torr. — Confined to areas along the coast in Flonda, 

 Georgia, Alississippi, and probably Alabama. In Florida frequently 

 seen in acid freshwater ponds just behind the dunes along the Gulf of 

 Mexico. 



6. E. elongata Chapm. — Noted by the senior author with the pre- 

 ceding in the Gulf region of North Florida, and collected from the 

 Okefinokee Swamp and from acid, open limesinks in Georgia. Occurs 

 also in South Alabama, but its range in our territory is not extensive. 



7. E. obtusa (Willd.) Schultes — One of the most frequent of our 

 Spikerushes, usually occurs at the margins of ponds or in swamps 

 and muddy places, range includes all of our territory. 



8. E. smallii Britton — Northern range but recently collected from 

 Tennessee by Dr. H. K. Svenson in the Interior Low Plateaus. A 

 collection from Meadow Pond near Wilson Reservior in North 

 Alabama by T. F. Hall has been determined as this species by Dr. 

 Svenson, and it may prove to have an even wider distribution in our 

 territory. 



9. E. calva Torr. — Known in our area from Florida (no locality 

 given on collection). South Carolina, and Middle Tennessee. It, too, 

 may prove to have an even wider distribution, as it is difficult to 

 identify. 



10. E. geniculata (L.) R. & S. — Usually not strictly aquatic but 

 occurs marginal to freshwater areas in Florida and has been recorded 

 once from South Carolina. 



11. i?. atropurpurea (Retz.) Kunth — Has been recorded from wet 

 places in the Coastal Plain of Georgia and Florida. 



12. E. olivacea Torr. — Infrequent, not seen by the writers. Has 

 been collected so seldom in the Southeast that it is difficult to charac- 

 terize its distribution. 



13. E. flavescens (Poir.) Urban— Coastal Plain, most frequently 

 along the coast, Florida north and west to the limits of our territory. 



14. E. acicularis R. & S. — Rare in our territory but occurs in most 

 of the States. The senior author collected it once from an acid, open 

 limesink pond in South Georgia. 



