246 EEPOET OF THE STATE GEOLOGIST. 



7. Observations made by the writer during several years past 

 in the vicinity of Ann Arbor. 



8. A veiy few species have been admitted on the authority of 

 Gray's Manual of Botany. 



"The catalogue shows, except in the case of very common, 

 plants, evjry locality where each species was noted, and, affixed 

 to this, the date, provided the plant was seen in flower. Such 

 plants as are common to this list and Dr. Wright's, have their 

 localities designated, in a general way, by initials correspond-, 

 ing to the four quarters of the Lower Peninsula, thus: "S. E., 

 (Wright)," "S. W., (Wright)," &c. All other localities are 

 definitely stated, and the authority, if other than our own ob- 

 servations, follows in parenthesis. The corrections of nomen- 

 clature within the space of 20 years have converted many of 

 Dr. Wright's names into synonyms, which are made to follow 

 the modern name thus: Hepatica triloba, Chaix, (H. Ameri- 

 cana — W.J 



For the purpose of convenient reference, as well as economiz- 

 ing space, the common names of most of the species have been 

 placed in the left hand margin opposite the scientific names. 



