206 



NATURAL HISTORY OF PLANTS. 



In the group Psoralen or Amorphea we find the greatest reduction 



Glgcyrrhiza glabra. 



of the flower in this series. 



Amorplia frul icosa. 



Fig. 166. 

 Flower (f). 



Fig. 165.— Habit (]). 



Sometimes the corolla is reduced to a 

 single petal, the standard, as in Amor- 

 pha (figs. ICO, 167), or is altogether 

 absent as in Parhelia ; sometimes, as 

 in P sored i'd, the ovary contains but a 

 single ovule. U r e may rarely find 

 two or three ovules; and one genus, 

 Amgrcea, is so far exceptional as to 

 possess half a dozen. The androceum 

 alone remains as in most Papilionacea ; 

 it is decandrous and monadelphous. 

 The Psoralea are herbs or shrubs 

 whose leaves are covered with glan- 

 dular dots. The flowers form racemes 



Fig. 167. „ . 



Long. sect, of flower, or spikes, and possess muticous an- 



