160 



DEFINITE INFLORESCENCE. 



these leaves rarely produce buds, but in the present plant they 

 generally do. The buds so produced are flower-buds, and constitute 

 secondary axes, a" a", ending in single flowers, f" f", which thus are 

 terminal and solitary ; and at the base of these axes a pair of opposite 

 leaves is produced, giving rise to tertiary axes, a'" a!" a'", ending in 

 single flowers, f" f" f", and so on. The divisions in this case 

 always take place by two, or in a dichotomous (otxa, in two ways, and 

 ispi/a, I cut) manner. Had there been a whorl of three leaves in 

 place of two, the division would have been by three, or trichotomous 

 (*/, in three ways). 



>, R l' ^~' v ^ADemone nemorosa. a, Subterranean stem. /, Leaf rf, Horal axis producine 

 nracts, o, wnich form a three-leaved involucre, c, Solitary flower terminating the axis. Inflor- 



