1868.1 



161 



[Brlgham. 



Taking all the plants both native and introduced, we have as the pro- 

 portion of species to each genus 2.58 



The endemic genera alone 3.94 



The genera represented only by endemic species, .... 1.28 



Introduced genera, 1.07 



Endemic genera of only one species, 16. 



Genera of a single endemic species, 49. 



Introduced genera of one species 43. 



Other genera of one species, 45. 



Percentage of all the endemic species 68.05 



" species of endemic genera, 28. 



" introduced species, 12.46 



" species discovered by Mann and Brigham, . . . 12.11 



" species found elsewhere 19.49 



The new genera of flowering plants described or enumerated by 

 Mr. Mann, are Alsinidendron H. Mann; Platydesma H. Mann; Di- 

 panax B. Seemann; Hesperomannia A. Gray; Brighamia A. Gray. 

 Of the whole collection made by us, some twelve sets have been dis- 

 tributed, numbering from three hundred and fifty to five hundred 

 phffinogamous plants, and many partial sets have also been published. 



PROCEEDINGS B. S. N. H.— VOL. XII. 11 DECEMBER, 1868. 



