ERRATA. 



Page 15, line 12, for Philadelplms microphyllus , read Pliiladelphus serpylU- 

 folins. 



Page 27, line 3, for Amorpha hlspidula, read Amorpha Californica. 



Page 33, line 35, for Castanea chrysophylla, read Castanea sempervirens . 



Page 84, line 18, add as synonym of Rihes lacustre molle Gray, R. monti- 

 genum McClatehie, Erythea v. 38 (1897). 



