ERRATA. 



Page 106. After generic description of Rigiopappus read 



*'R. leptocladus. — Niles. Spring." 

 Page 163. For "Gillia" read "Gilia." 

 Page 163. For "audroscaea" read " androsacea." 

 Page 171. 6th line from bottom, for "decuscate" read 



"decussate." 

 Page 172. 9th line from bottom, for "L" read "S." 

 Page 215. 7th line from top, after "^"Sj^ert " — 



Niles. Summer." 



Page 262. 10th line from bottom, omit comma between 



"late" and "dehiscent." 

 Page 275. 12th line from top, for "7 " read "5." 

 Page 283. 4th line from top, for " Calif ornicus " read 



" Calif ornicum." 

 Page 299. 11th line from top, after "not " insert "at." 

 Page 311. 1st line, for "tenela"read "tenella. " 

 Page 330. For ' ' Pillularia ' ' read ' ' Pilularia. " 



