No. IT.] AGRICULTURAL COLLEGE. \\J 



POLYGONACE.E. 



Prince's Feather. Polygonum orientate, L. 



Ames. 

 Polygonum. Polygonum Pennsylvanicum, L. 



Ames. 



Lady's Thumb. Polygonum Persicaria, L. 



Ames ; Burlington. 



Smartweed. Polygonum Hydropiper, L. 



Ames ; Burlington. 



Water Persicaria. Polygonum amphibium, L., var. terrestre, Willd. 



Ames. 



Polygonum Yirginianum, L. 

 Ames. 



no grass. Polygonum aviculare, L. 



Ames ; Burlington. 

 Larger Knotgrass. 



Polygonum ramosissimum, ALichx. 



Ames. 

 Black Bindweed. p olygonnm Convolvulus, L. 



Ames; Burlington. 

 Climb'g False Buck- p l y g 0num dumetorum. L. (?) 



wheat. n . 11 



Grmnell. 



Buckwheat. Fagopyrum esoulentum, Mcench. 



Ames. Escaped from cultivation. 



Pale Dock. Rumex Britannica, L. 



Ames. 



Curled Dock. Rumex crispus, L. 



Ames ; Charles City. 



Sheep Sorrel. Rumex Acetosella, L. 



Ames. Lately introduced from the East, where it is abundant 

 in sterile and worn fields, as on unwelcome weed. 



SANTALACE^E. 



Bastard Toad-flax. Comandra umbellata, Xutt. 



Ames ; Charles City ; Grinnell ; Burlington. 

 EUPHORBIACEJ3. 



Spnrge. Euphorbia serpyllifolia, Pers. 



Ames ; Charles City. 



