No. 17. 1 AGRICULTURAL COLLEGE. 1X5 



CONYOLVULACE.E. 



Hedge Bindweed. Calystegia sepium, E. Pr. 



Ames; Charles City ; Grinnell; Burlington. A common and 

 troublesome weed in fields. 



Dodder. Cuscuta Gronovii, Willd. 



Ames. 



Cuscuta gloinerata, Choisy. 



Ames ; Indianola. 



SOLANACEiE. 



Black Nightshade. Solauum nigrum, L. 



Ames, and elsewhere. Flowers purplish tinged ! % mc ^ 

 broad. Berries eaten in some parts of the State. 

 Ground Cherry. Physalis VlSCOSa, L. 



Ames ; Grinnell ? 



Physalis Pennsylvania, L. 



Ames ; Charles City. 



" Jimson » or Thorn Datura Stramonium, L. 



Apple. 



Ames, Indianola, Knoxville, and Burlington. An unsightly and 



poisonous weed. 



GENTIANACE.E. 



Five-flowered Gen- Gentiana quinqueflora, Lam. 



tian - Ames. 



Fringed Gentian. Gentiana crinita, Froel. 



Ames ; Grinnell. 



Whitish Gentian. Gentiana alba, Muhl. 



Ames. 



Closed Gentian. Gentiana Andrewsii, Griseb. 



Ames ; Grinnell ; Charles City. 



soap wort Gentian. Gentiana Saponaria, L. 



Ames. 



Gentiana puberula, Michx. 



Ames. 



APOCYNACEiE. 



Spreading Dogbane. Apocynum androssemifolium, L. 



Ames ; Charles City ; Burlington. 



Indian Hemp. Apocynum cannabinum, L. 



Ames ; Burlington. 



