646 Polygonum amphibiam. v. aquaticum 



647 Polygonum amph.ibium. v. terrestre 



X <$> 



Poly^onum 

 apatiutblium. 649 



Polygonumlapathi 

 folium, v/rubrutn 



650 Polygonumlithifolium.T'. maculatum 



Polygonum p ersicaria. 



