Statistics of the Catalogue. 



FLOWERING PLANTS. 



Species native to the Nantucket Flora 470 



Species introduced 116 



Whole number of species 586 



Varieties, native and introduced 50 



Whole number of species and varieties 636 



SYSTEMATIC DISTRIBUTION. 



Species and 

 Genera. Varieties. 



Polypetalse 104 169 



Gamopetalae 108 301 



Apetalse 29 70 



Whole number of Dicotyledons 341 440 



Gymnospermae 3 3 



Monocotyledons 86 193 



Whole number of flowering plants .... 339 636 



Flowerless plants excluding algae 19 40 



Algae . 60 112 



Whole number of flowerless plants 79 153 



Farther statistics are not attempted, as they would be misleading unless 

 qualified by analysis. The repeated interference with the natural growth 

 of the island mentioned in the preface, has left a flora that must vary 

 much in its proportions from that which once covered the surface. About 

 twenty species of plants not counting trees, true natives, are represented 

 by a single individual, by two, or by a small group or patch of less 

 than a dozen plants. These, by the good hap of growing in places diffi- 

 cult of access, too deep in the swamps even for fire to reach them, have 

 survived the destruction of the rest of their kind, and are valuable as 

 indicating a larger flora than now prevails; but in a table of statistics 

 they ought not to count equally with the huckleberry bushes that over- 

 spread the hills, and the leather-leaf found in every swamp. What is left 

 of the wild growth has its lessons for special students, but each one, 

 knowing what he wants, will be obliged to reach his results from his own 

 count with its necessary deductions and qualifications. 



