67 



often as P. Strobus, South of Duluth it is seen along the rail- 

 road towards St. Paul, which for a long distance passes through 

 a very sandy country, drained by the St. Croix River. In the 

 eastern part of the State it extends as far south as the junction of 

 Snake River with the St. Croix, (latitude 45° 50'). In Upham's 

 " Catalogue of the Flora of Minnesota," (1883), it is said to be 



M 



Wing 



In the central part of the State it is found north of St. Cloud, 

 and about the same distance south as on the St. Croix, at 

 Brockway, in the north-eastern part of Stearns County, or a few 

 miles north of St. Cloud. East of the Mississippi, it has its south- 

 ernmost limit in Minnesota, at Princeton, in Millc Lacs County, 

 in the same latitude as St Cloud, (45"" 33'), 



Its general southern limit west of Lake Huron may, there- 

 fore, be placed at about 43° in Michigan, to 46° in Minnesota, 

 whence after crossing the Mississippi, it extends northwesterly to 

 the Saskatchewan. Aside from this are the southerly extension 



M 



ern Illinois. 



The New Edition of Gray's Manual. 



jf the Botany of 



^> 



the District east of the Mississippi and North of North Car- 

 olina and Tennessee, by Asa Gray. Sixth Edition, revised 



* 



and extended zifestzvard to the looth meridian. Sereno Wat- 

 son and John M. Coulter, assisted by specialists in certain 

 groups. 8vo., pp. 760; 25 plates: New York, 1890, 

 By those, who, from the time of its appearance, have made 

 constant use of Dr. Gray's Manual of 1867, this new and revised 

 edition has been waited for with no small degree of interest. 

 That it would come up fully to the wants and demands of the 

 age and incorporate aU the results of active investigation carried 

 on since for almost a quarter of a century, was a reasonable ex- 

 pectation. That it has done so, cannot be truthfully said. 



Viewed as a manual, or hand-book, designed not only for 

 experienced botanists already in possession of its contents, but 

 chiefly for the great mass of priv^ate students, and beginners and 



