ALTAMAHA GRIT REGION OF GEORGIA 97 



The colors of the flowers are distributed about as follows: 

 anemophilous, white, and yellow, 8 each; cream, 4; purple, 2. 

 Wind and resilient stems seem to be the principal agents for 

 dissemination. 



Xyridaceae is the largest family in the list and Xyris therefore 

 the largest genus. The fact that this list contains all the Laur- 

 aceas and Cyrillacea? of the Altamaha Grit region is interesting. 

 This is the only habitat group in which dicotyledons are in the 

 minority, and 48.6% of the angiosperms are monocotyledons. 

 The total absence of anything between Cyrillaceoe and Haemo- 

 doracese is striking. 



There is no marked peculiarity about the ranges of these 

 species. About half of them are confined to the pine-barren 

 region. 



17. Sand-Hammocks. 



There are a few examples of sand-hills, which while having 

 much the same aspect as others, have quite a different vegetation, 

 consisting of more woody plants than herbs, and a considerable 

 proportion of evergreens. The reason for this difference however 

 is still a mystery. Such places are sometimes called sand- 

 hammocks (plate XV, figs. 1 and 2), doubtless because of the 

 resemblance of their flora to that of the hammocks (which will 

 be discussed next). They must bear considerable resemblance 

 to the "scrub" of Florida, from all accounts. The "rosemary" 

 sand-hills of Emanuel County, which I visited in 1901 1 , are a 

 good example of sand-hammock, and there is a similar place on 

 the Ohoopee River nearly opposite the mouth of Pendleton Creek 

 in Tattnall County. The following species have been observed 

 at these two places. (They are arranged in approximate order 

 of abundance, as usual, but the frequency numbers are omitted, 

 as they would be only either 1 or 2 in each case.) 



Quercus Catesbsei 3 — * 



Quercus laurif olia 3 — 



Magnolia grandiflora 5-6 cream 



Ilex opaca 4-5 greenish 

 Pinus palustris 3 — - 



Osmanthus Americana greenish 



1 See Bull. Torrey Club, 30: 285. /. 2. 1903. 



