E RR AT A. 



Page 28, line 14, for on read or. 

 Page 42, " 25, for margined read marginal. 

 Page 73, " 3, after California insert by. 

 Page 73, " 7, for diagnosis read diagnoses. 

 Page 79, for Crythanthe read Cryptanthe. 



Page 88, " 8, after had insert been. 

 Page 96, for stellaroides read stellarioides. 



Page 158, " 8, for Elthamensis' read Eltbamenaia. 

 Page 185, at foot of page, for 1905 read 1906. 

 Page 196, line 15, for Conduz read Tonduz* 

 Page 228, line 14, for exact read erect. 

 Page 230, for caulescentes, read caulescentia. 

 Page 240, line 2, for acueli read aculei. 



