No. 17.] 



Mouse-ear Chick- 

 weed. 



Larger Mouse-ear 

 Cbickweed. 



Com Spurry. 

 Carpet-weed. 



Purslane. 

 Portulaea. 

 Spring Beauty. 

 Spring Beauty. 



95 



AGRICULTURAL COLLEGE. 

 Cerastium vulgatum, L. 



Fayette ; Burlington. 



Cerastium viscosum, L. 



Ames ; Burlington. 



Cerastium nutans, Raf. 



Indianola. 



Spergula arvensis, L. 



Ames. 



Mollugo verticillata, L. 



Cedar Rapids. 



rORTULACACEJS. 



Portulaea oleracea, L. 



Common as a weed in gardens and fields. 



Portulaea qrandiflora, , 



Escaping as a weed at Charles City. 



Claytonia Yirginica, L. 



Ames ; Charles City ; Indianola'; Griunell ; Fayette ; Burlington. 



Claytonia Caroliniana, Michx. 



Grinnell. 



Common Mallow. 



High Mallow. 



Indian Mallow. 



Bladder Ketmia. 



Basswood. 



Wild Flax. 



MALVACEAE. 



Malva Totundifolia, L. 



Ames ; Des Moines ; Cedar Rapids. 



Malva sylvestris, L. 



Ames. 



Abutilon Avicennce, Gasrtn. 



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. 

 LIN ACE. E. 



Linum sulcatum, Biddell. (L. Eoottii, Planchon.) 



Ames ; Charles City ; Burlington. 



