THE IXCOMPLET^ 



41 



tliaii Annual Mercury, although tlie latter is not infre- 

 quently met with as a g-arden plant. Dog'y Mercury is 



Fig. 20.— Dog's Uercxny {Stereuriali^ perennU) 

 a, ilale flower, b. Same, enlaigert. e, Female flower. 



a common woodland herbaceous weed standing from 

 6 to 12 inches high. It is somewhat difficult to identify 

 fi-om the flowers, these being small and insignificant, and 

 also of the same colour as the leaves. The flowers ai-o 



