GEOGRAPHY AND VEGETATION OF NORTHERN FLORHIA. 187 



in northern Florida that species is most abundant. To obviate the 

 necessity of looking' through nineteen or twenty lists, the pages on 

 which the double + marks appear are all indicated in the index. 



The technical name of every species is given, the names being 

 mostly the same as in the second edition of Small's Flora of the 

 Southeastern United States, 1913. (Where that book is not fol- 

 lowed it is usually because the subdivision of genera and species is 

 carried farther in it than the facts seem to warrant.) 



The names of evergreens are printed in bold-face type, so that 

 they will be more conspicuous, as the plants themselves are in win- 

 ter. In the case of a few species that are semi-everg'reen onlv half 

 the name is printed in bold-face. 



The names of weeds are followed by (X), or in doubtful cases 

 (X?). In deciding whiA are weeds no dependence has been placed 

 on statements in botanical manuals, for in such books many species 

 which are unc|uestionably weeds are not distinguished in any way 

 from native plants. The only reliable test of weediness is habitat, 

 a matter which is greatly neglected by most systematists. When a 

 species is found in a given region only in habitats created or modi- 

 fied by civilization it is assumed that it did not exist in that region 

 originally; whether the history of its introduction is known or not, 

 and even whether the same species is known in any foreign country 

 or not. The application of this criterion results in classing as weeds 

 many species which have probably never been thus stigmatized be- 

 fore. (It is interesting and probably significant that very few of 

 the weeds are evergreen). 



The technical names are followed by common names, if such 

 are known.. Nearly all the trees have common names, but some of 

 the smaller plants are so inconspicuous or unimportant that they 

 have never been named except by botanists. For many such plants 

 alleged common names can indeed be found in botanical books, but 

 these are often mere translations of the technical names, and would 

 mean no more to the average reader than the technical names do. 

 The common names adopted here are hona-Hdc ones, known to be 

 used in Florida by persons who did not get them from books, biit 

 in a few cases names used in other states, which may be familiar to 

 some readers, are given in parentheses. 



In the last column the usual habitat of each species is indicated 

 in a few words, but no special study of habitats is attempted here. 

 as previously explained. . . 



12 



