A GUIDE AND KEY TO AQUATIC PLANTS 97 



12. R. harveyi W. Boott — Georgia to Virginia and westward, 

 infrequent. 



13. R.JilifoliaToTT. — Acid ponds in the pine-barrens, Coastal Plain, 

 Florida to North Carolina and westward along the Gulf to beyond the 

 limit of our territory. 



14. R.fusca (L.) Ait. f. — Distribution similar to that of the preced- 

 ing. 



15. R. harperi Small — Known only from pineland ponds in the 

 Coastal Plain of Georgia. 



16. R. gracilenta A. Gt&j — Acid ponds and swamps, mostly in the 

 Coastal Plain, Florida north and west beyond the limits of our terri- 

 tory. One of the more frequent species of the genus. 



17. R. Jascicularis (Michx.) Vahl — Low pinelands and pineland 

 ponds, Coastal Plain, Florida to North Carolina and westward to the 

 limit of our range. 



18. R. wrightiana Boeckl. — Coastal Plain in acid situations, Florida 

 north to North Carolina. 



19. R. torreyana A. Gray — Acid swamps, Coastal Plain, Georgia to 

 the northern limit of our territory. 



20. R. compressa Carey — Pineland ponds. Coastal Plain, Florida to 

 Georgia and westward. 



21. R. cymosa Ell. — Various provinces, range covers all of our 

 territory. 



22. R. edisoniana Britton — Ponds and swamps of peninsular Florida. 



23. R. perplexa Britton — Coastal Plain swamps, Florida to North 

 Carolina and Louisiana. 



24. R. globularis (Chapm.) Small — Coastal Plain pinelands, Florida 

 north and west to the limits of our territory. 



25. R. stipitata Chapm. — Coastal Plain pineland swamps, Florida 

 to North Carolina and Louisiana. 



26. R. miliacea (Lam.) A. Gray — Pond margins mostly in calcareous 

 areas. Coastal Plain, Florida to North Carolina and Louisiana. 



27. R. schoenoides (Ell.) Britton — Pond margins. Coastal Plain, 

 Florida to North Carolina and Louisiana. 



28. R. microcarpa Baldw. — Acid pineland ponds. Coastal Plain, 

 Florida to North Carolina and westward along the Gulf to beyond the 

 limits of our territory. 



29.' R. decurrens Chapm. — Known only from swamps in West 

 Florida. 



30. R. patula A. Gray — Acid pineland swamps. Coastal Plain, 

 Florida north to North Carolina and west to Mississippi. 



31. R. caduca Ell. — Swamps, mostly Coastal Plain, Florida to 

 North Carolina and west beyond the limits of territory. 



32. R. mixta Britton — Coastal Plain swamps and ponds, Florida to 

 Georgia and westward beyond the limit of our range. 



