742 



WEED FLORA OF IOWA 



rianlago major (common plantain) (As.). 

 Polygonum aviculare (dooryard knotweed) 

 Polygonum hydropiper 1 (smart weed). 

 Polygonum lapathi folium (smartweed). 

 Potentilla anserma (silvery cinquefoil). 

 Potentilla monspeliensis (five-finger) (As.). 



(As.). 



Fig. 559. Holy or Vanilla Grass (Hierochloe borealis). Common in the northern 



hemisphere, mountain regions. In northern Iowa. 



(Lamson-Scribner, U. S. Dept. Agr.) 



Prunella vulgaris (self-heal). 

 Badicida palustris (marsh cress) (As.). 

 Banunculus cymoalaria (crowfoot). 

 Banunculus pennsylvanicus (crowfoot) (As.), 

 Banunculus repens (crowfoot). 

 Bhinanthus crista-galli (yellow rattle). 



