STATE GEOLOGIST. 



251 



Hedge Mustard. 

 Tansy Mustard. 

 White Mustard. 



Field Mustard, 

 Charlock. 



Black Mustard. 

 Whitlow-grass. 

 Whitlow-grass. 



Wild pepper- 

 grass. 



Shepherd's purse 



American sea- 

 rocket. 



Sisymbrium officinale, Scop. 



Ann Arbor. 



Sisymbrium canescens, Nutt. 



Shore of L. Mich. 



Sinapis alba, L. 



Ann Arbor. 



Sinapis arvensis, L. 



Ann Arbor. 



Sinapis nigra, L. 



Ann Arbor. 



Draba arabisans, Michx. 



" Upper Michigan," (Gray). 



Draba iicmorosa, L. 



Ft. Gratiot, (Gray). 



Lepidium Virjrinicum, L. . 



Ann Arbor; Saginaw Bay, 14 June. 



Lepidium intermedium, Gray. 



N. W. (Gray). 



Capsella Bursa-pastoris, Moench. 



Ann Arbor; Sant St. Marie, 30 July. Abundant everwhere. 



Cakile Americana, Mutt. 



Pt. au Chene, L. Mich., 18 Aug.; frequently seen on sandy beaches; rare- 

 ly seen with both juints of the pod containing a perfect seed. 



CAPPAKIDACF^l. 



Polanisia graveolens, Eaf. 



S. Michigan, (Wright). 



VIOLACE^E. 



Bonn 1 -leaved 

 Violet. 



Sweet White 

 Violet. 



Common Blue 

 Violet. 



Hand-leaf Violet. 



Arrow-leaved 

 Violet. 



Viola rotnndifolia, Michx. 



.Sugar Island. 



Viola bland a, Willd. 



Ann Arbor; North shore L. Mich. 



Vinla cucullata, Ait. 



Ann Arbor; Saginaw B.; Drummond's I.; Ft. Gratiot. 



var. pttliuaia. 



Ann Arbor, (Miss Clark). 



Viola sagittata. Ait. ( V. ovata — W.) 



Ann Arbor; Detroit, (Miss Clark). 



Bird-foot Violet. "Viola podata, L. 

 Ann Arbor. 



Long-spurred 

 Violet. 



American Dog 

 Violet. 



Viola rostrata, Pnrsh. 



Ann Arbor, common in May. 



Vi 'a Muhleubergii, Torr. 



Ann Arbor. 



