Flora of Vermont 141 



species, varieties, forms and hybrids (barring all synonyms) has been 

 increased from 1,563 in the former edition to 2,006 in the present 

 edition. For the Pteridophyta (the Ferns and their Allies), and for 

 the three largest families and seven of the more critical genera of 

 Seed-plants we obtain the following instructive record : — 



NUMBER OF NAMES IN THE LIST OF 1915, OF 1900 ''"oC^nt. 



SPECIES* VAR. SUB.VAR. HYBRIDS TOTAL TOTAL INCREASE 



All Families 1,694 130 133 65 2,022 1,562 291/3 



Pterodophyta ... 73 10 29 16 128 81 58 



Cyperacese 162 37 17 3 219 192 14 



Compositse 181 13 29 1 224 171 31 



Graminai 151 7 7 165 130 27 



Carex Ill 35 8 3 157 135 16 



Crat^gus 28 5 11 44 7 528'/^ 



Viola 23 2 16 41 16 156 



Rubus 17 1 15 33 16 106 



Panicum 27t 1 28 19 47 



Scirpus 22 1 6 29 20 45 



Juncus 19 6 25 15 67 



♦When a species is represented in the State by a variety only, it is 

 counted as a species and not as a variety. 



flncluding three species transferred to Digitaria and Echinochloa. 



In the edition of 1900 three "Supplementary Lists" were given of 

 plants reported in earlier Vermont catalogues, but omitted because no 

 corroborative specimens could be found. It was anticipated that 

 many of these species would be rediscovered ; and so it has proved. 

 In such cases the names have been inserted in the present edition ; and 

 as these lists have largely served their purpose, they are not re- 

 published. But an interesting paper might be written on the tasks 

 undertaken to release certain of these species from the purgatory into 

 which they were thrust by the compilers of the list published in 1900. 



One other supplementary list in our last edition calls for a brief 

 comment — a list, largely conjectural, of plants that have been intro- 

 duced into Vermont from other parts of the United Sates. There is 

 no practical difficulty in distinguishing, for a region as large as that 

 covered by the Gray Manual, plants that are indigenous from those 

 that have come in through man's agency from Eurasia or tropical 

 America — those whose names are printed in the Gray Manual with 

 small capitals. But it is a dififerent problem to separate, for a region 

 as small as Vermont, plants indigenous to the State from those that 

 have been introduced from without. In some instances there can 



