Wheeler: THE FLORA OF THE RED RIVER VALLEY. 571 



diate vicinity of Hallock. These plants were the ordinary types of the 

 prairie and woodland of that region. One plant, however, Plantago 

 eriopoda, is worthy of note as being a salt lover; it was collected 15 

 miles southeast of Hallock on sandy alkali soil. I afterwards found 

 this plant growing sparsely six miles east of Warren. 



As a result of my observations I draw the following conclusions: 

 The soil of the entire valley is alkaline. The alkalinity is strongly 

 marked in small localities only, which are popularly called " alkali 

 spots." In Kittson and Marshall counties there are a few similar 

 " salt spots," natural and artificial. 



There are few halophytes in the valley; I found but two which I 

 considered purely halophytic, these are B. 2680 Salicornia, growing 

 in a coulee which had formerly drained a salt well at Northcote; and 

 B. 2789 Plantago, growing in somewhat elevated sandy soil near 

 Warren. There are also four chenopods, B. 2701, B. 2702, B. 2787, 

 and B. 2576, which are semi-halophytic in character. These grow 

 quite generally in many places in the valley, but are most numerous 

 and luxuriant on the beaches of alkali lakes and ponds and in the 

 vicinity of alkali spots. 



A more thorough study of the region visited will doubtless add to 

 the list of halophytes of the State and certainly extend the range of 

 those already noted. 



The principal object of Professor MacMillan, in his visit to 

 the valley, was to secure a series of characteristic photographs 

 of vegetation and portraits of plants to illustrate the flora of the 

 region. There are presented herewith some views selected by 

 him and made under his direction by Mr. C. J. Hibbard, Pho- 

 tographer of the Survey. They will serve to give an idea of the 

 vegetation-sheet in the district covered by the list and will indi- 

 cate some details of ecological distribution as suggested in the 

 descriptions of the plates written by Professor MacMillan. 



LIST OF SPECIES. 



SPARGANIACE.E. 

 Sparganium eurycarpum ENGELM. in A. Gray, Man. Ed. 



2, 430. 1856. 



Coll.: MacMillan & Skinner 131, Maple lake; 398, 

 Holmes. 



Sparganium simplex HUDS. Fl. Angl. Ed. 2, 401. 1788. 

 Coll.: Ballard 2581, Humboldt. 



