ERRATA. 



Page 76, line 10, for " Novi Belgi," read -Novi Belgii." 



" 79, " 8 from bottom, for " S. mollis," read " Solidago mollis." 

 " 80, " 4, for "S. albicaulis," read "L. albicaulis." 

 " 97, " 8 from bottom, for " puppus," read " pappus." 



