XXXIV PLAN. 



X Probably introduced, but admitting of some doubt 

 upon the subject. 



When the whole account of a plant is included within 

 [ ], that species is considered as having the very slenderest 

 or even no claim to a place in our Flora, although recorded 

 by preceding writers. 



The duration of plants is marked by the letters A., B., 

 P., Sh., and T. ; being the abbreviations of the terms An- 

 nual, Biennial, Perennial, Shrub, and Tree, respectively. 



