Summary of the Catalogue. 



The total number of families, genera, and species and varieties 

 at present known to occur naturally in the Altamaha Grit region 

 may be tabulated as follows: 



Groups 



Families 



Genera 



Species and 

 varieties 



Gamopetalas 



3 1 



122 



238 



Archichlamydeae 



58 



138 



260 



Monocotyledones 



2 3 



80 



213 



Gymnospermse 



1 



3 



9 



Pteridophyta 



6 



T4 



19 



Musci 





20 



28 



Hepaticae 





iS 



17 



Thallophyta 





12 



13 



Total dicotyledons - 



89 



260 



498 



Total angiosperms 



112 



34o 



711 



Total spermatophytes 



"3 



343 



720 



Total vascular plants 



119 



357 



739 



Total cellular cryptogams 





47 



58 



Grand total 





404 



797 



The 75 weeds which have already been listed separately 

 (pages 114, 115) are not included in this enumeration, and all 

 the following statistics will refer to native plants only, unless 

 otherwise specified. 



How nearly complete this catalogue is can only be conjectured. 

 Considering the uniformity of the environmental conditions in 

 different parts of the region, the open character of the forests, 

 the conspicuousness of many of the species (at least 300 being 

 large enough to be recognizable from a moving train), and the 

 fact that I have passed through every county in the region more 

 than once, it is not likely that more than 25 per cent, of the 

 vascular plants (according to our present conceptions of species) 

 have escaped me. The total number of spermatophytes probably 

 does not exceed 1000, pteridophytes 25, and bryophytes 100. 

 The number of thallophytes may ultimately run up to several 

 hundred, but it is not likely that they are in the majority here 

 as they are in most other parts of the world. 



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