150 



qualitative correlations between geology and flora, pointing out 

 several cases of species present on one formation and not on 

 neighboring ones. And if his studies had been quantitative and 

 had included herbs, doubtless still other differences could have 

 been found, for two areas might conceivably have the same spe- 

 cies of plants on them, but in such different proportions as to 

 give quite a different aspect to the vegetation. 6 



It happens that I made brief visits to Austin in the summers 

 of 1918 and 1934, and took what notes I could on the vegetation 

 near by, without suspecting any such definite correlations as 

 Cuyler has made, but I have no reason to question the accuracy 

 of his statements. However, it seems quite likely that if the same 

 formations were traced to greater distances, and the vegetation 

 on them studied in the same way, some exceptions to his correla- 

 tions might be found. This is a promising field for future ecolog- 

 ical work; and a revised geological map of the state, published 

 since Cuyler's paper, should facilitate such a study. 



University, Ala. 



6 See Ann. Rep. Fla. Geol. Surv. 6: 175-180. Dec. 1914. Also Torreya 17: 1 

 (footnote). Jan. 1917. 



