

of Mississippi and Louisiana 101 



2. Bray, W. L. On the Relation of the Flora of the Lower Sonoran 



Zone in North America to the Flora of the arid Zones of Chili and 

 Argentine. Bot. Gaz. 26: 121-147. 1898. 



3. Cowles, H. C. The ecological Relations of the Vegetation on the 



Sand Dunes of Lake Michigan. Bot. Gaz. 27: 94-117; 167-202; 

 281-308; 361-391. 1899. 



4. Harshberger, John W. An ecological Study of the New Jersey 



Strand Flora. Proc. Acad. Nat. Sci. Phil., 1900: 623-671. O., 



1900. 



W. Report on the Geology and Agriculture of the 



State of Mississippi. Jackson, Miss. i860. 



6. Kearney, T. H., Jr. The Plant Covering of Ocracoke Island : A 



Study in the Ecology of the North Carolina Strand Vegetation. 

 Contrib. U. S. Nat. Herb. 5: 261-319. 1 Au. 1900. 



7. Macmillan, C. Observations on the Distribution of Plants along the 



Shore at Lake of the Woods. Minn. Bot. Stud. I: 949-1023. 

 1897. 



8. Moseley, E. L. The climatic Influence of Lake Erie on Vegetation. 



Am. Naturalist, 31 : 60-63. J a - l8 97- 

 9- Torrey, John. Observations on the Batis maritima, of Linnaeus. 

 Smithsonian Contributions. S. 1850. 



■ 



10. Warming, E. Botaniske Exkursioner. Videnskabelige Middelel- 

 ser fra den Naturhistoriske Forening. 1891. 



11. Webber, H. J. Notes on the Strand Flora of Florida. Science, 

 II. 8: 658, 659. N. 1898. 



12- Porter, T. C. Rare Plants of Southeastern Pennsylvania. March, 



1900. 



Explanations of Plates 



PLATE 8. Pankum amarum dunes, with Tpomoea acetosaefolia on the extreme left 

 weground and /. pes-caprae on the extreme right. 



PlATE 9. Iva imbrkata dunes on the sand spit plain ; a stem of Ipomoea Pss-caprae 

 m the foreground. 



Platk io. Sand spit plain. Serenoa serrulata dunes. In the middle foreground 

 * Panicum repens dune. Left foreground Cyperus cylindricus . Finns Taeda in the 

 background ; pine graveyard on the right. 



. &ATE 11. Shell dune showing lee margin encroaching on a pure Batis associa- 

 "°n. On the dune Iva frutescens. 



