LAVENDER TO ] 



(First, see whether plant falls in Class 1 or II; then 

 is reached, this number i 



I. Leaves mostly opposite 



II. Leaves otherwise- 



climbing, spreading- 

 or trailing 



upright- 



fn. in raceme (10) 

 -ifl. in cluster (n) 



[fl. in head (12) 



no leaves (13) 

 leaves in water (14) 



otherwise 



Ivs. fr. i 

 only 



otherwis 



