98 



AGRICULTURAL COLLEGE. 



[No. 17. 



Stone Clover. 



Red Clover. 

 White Clover. 



Low Hop-Clover. 



White Meliot. 



Black Medick. 



Violet Prairie Clo- 

 ver. 



White Prairie Clo- 

 ver. 



False Indigo. 



Lead Plant. 



Common Locust. 



Ground Plum. 



Tick Trefoil. 



LEGUMINOS.E. 



Trifolium arvense, L. 



Lately introduced at Ames, 



Trifolium pratense, L. 



Cultivated largely. 



Trifolium repens, L. 



Introduced in cultivation. 



Trifolium procumbens, L. 



Lately introduced at Ames. 



Melilotus alba, Lam. 



Charles City ; Cedar Rapids. 



Medicago lupulina, L. 



Lately introduced at Ames. 



Psoralea argophylla, Pursh. 



Grinnell. 



Petalostemon violaceus, Michx. 



Ames ; Charles City ; Grinnell. 



Petalostemon candidus, Michx. 



Ames ; Charles City ; Grinnell. 



Amorpha fruticosa, L. 



Ames; Indianola; Grinnell; Burlington. 



Amorpha canescens, Nutt. 



Ames; Charles City; Indianola; Grinnell; Burlington. 



Eobinia Pseudacacia, L. 



Largely planted, especially in the southern counties, 

 quently called, also, Black Locust. 



Astragalus caryocarpus, Ker. 



Ames ; Charles City ; Grinnell ; Fayette. 



Astragalus Canadensis, L. 



Ames ; Charles City ; Burlington. 



Astragalus distortus, Torr. & Gr. 



Burlington. 



Desmodium acuminatum, DC. 



Ames ; Burlington. 



Desmodium cuspidatum, Torr. & Gr. 



Burlington. 



Desmodium paniculatum, DC. 



Grinnell. 



Fre- 



