THE STRUCrURE OF THE FLOWER 329 



shape, giving an inf^uhtr flower, whicli is synnnetrical about 

 one plane only — namely, that seen in the figure, lliere are ten 

 stamens, nine of \vln'(h arc united, wliile one remains free, and 



Fig. XXVII.— The Flower of a Pea (natural order Lcguminosap). 

 thus the androccium is dl-adclphous. The result of one stamen 

 being free is to leave a slit in the tube formed by the filaments, 

 through which the insect visitor can pass its proboscis when 



Fic. XXVIII.— The Flower of a Saxifrage (natural order Saxifragaccae). 

 seeking for honev. Tlie/,7/;?<rrrj/;/?, as we have already mentioned, 

 is monocarpcUavfj (see also p. 252). 



