9Q AGRICULTURAL COLLEGE. [No. 17. 



Common Flax. Linum usitatissimum^ L. 



Escaping from cultivation at Ames. 

 (.i;i:A\[A(i 

 wild cranesbiii. Geranium maculatum, L. 



Ames: Charles City; Grinnell ; Fayette. 



Tale Touch-me-not. ImpatienB pallida, Kutt. 

 Grinnell. 



Spotted Touch me- Impatiens fulv r a, Nutt. 



not. Ames; Fayette; Burlington. 



Violet Wood-Sorrel. Oxalis violacea, L. 



Ames ; Charles City ; Indianola ; Grinnell; Fayette; Barling- 

 ton. 



Yellow Wood-Sor- Oxalis stricta, L. 



rel. Ames; Charles City; Indianola; Grinnell; Fayette; Burling- 



ton. 



RUTACE.E. 



Prickly Ash. Zanthoxylum Americanum, Mill. 



Ames ; Charles City ; Fayette. 



AXACARDIA( 



Smooth Sumach. Elms glabra, L. 



Ames; Charles City ; Fayette; Burlington. 



Poison ivy. Rhus Toxicodendron, L. 



Ames; Charles City ; Fayette ; BurliDgton. 

 VITACE-K. 



Summer Grape. Vitis aestivalis, Michx. 



Burlington. 

 Frost Grape. Yiris cordifolia, Michx. 



Ames; Fayette ; Burlington. 



Virginia Creeper. A mpelopsis quiliquefolia, Mk'llX. 



Ames; Charles City; Fayette; Burlington. This beiutiful 

 vine is often mistaken for its poisonous relative, the Poison 

 Ivy. This creeper has Jive leaflet?, while the Poison Ivy has 

 but three. 



