No. 17.] 



AGRICULTURAL COLLEGE. 



95 



^ Mouse-ear Chick- 



weed. 



Larger Mouse-ear 

 Chickweed. 



Corn Spurry. 

 Carpet-weed. 



Purslane. 

 Portulaca. 

 Spring Beauty. 

 Spring Beauty. 



Cerastium vulgatum, L. 



Fayette ; BurliDgton. 



Cerastium viscosum, L. 



Ames ; BurliDgton. 



Cerastium nutans, Raf. 



Indianola. 



Spergula arvensis, L. 



Ames. 



Mollugo verticillata, L. 



Cedar Rapids. 



POBTULACACE.E. 



Portulaca oleracea, L. 



Common as a weed in gardens and fields. 



Portulaca grandiflora, , 



Escaping as a weed at Charles City. 

 Clavtonia Virginica, L. 



Ames ; Charles City ; Indian ola^; Grinnell ; Fayette ; Burlington, 



Claytonia Caroliniana, Michx. 



Grinnell. 



Common Mallow. 

 High Mallow. 

 Indian Mallow. 



• Bladder Ketmia. 

 Basswood. 

 Wild Flax. 



MALVACEAE. 



Malva rotundifolia, L. 



Ames ; Des Moine6 ; Cedar Rapids. 



Malva sylvestris, L. 



Ames. 



Abutilon Avicennce, Gsertn. 



Ames ; Indianola ; Fayette ; Marshalltown ; Burlington ; &c. 

 An Indian plant coming to us as a troublesome weed. 



Hibiscus Trionum, L. 



Escaping as a weed at Indianola. 

 TILIACE.E. 



Tilia Americana, L. 



Ames; Charles City ; Fayette; Burlington. 

 LINACE^E. 



Linum sulcatum, Riddell. (L. Boottii, Planchon.) 



Ames ; Charles City ; Burlington. 



