ART. XXXIV.-CATALOGUE OF PHJ^JOGAMOUS AND VASCULAR 

 CRYPTOGAMOUS PLANTS COLLECTED DURING THE SUM- 

 MERS OF 1873 AND 1874 IN DAKOTA AND MONTANA ALONG 

 THE FORTY-NINTH PARALLEL BY DR. ELLIOTT CODES U. S. 

 A. : WITH WHICH ARE INCORPORATED THOSE COLLECTED 

 IN THE SAME REGION AT THE SAME TIMES BY MR. GEORGE 

 M. DAWSON. 



By Prof. J. W. CniCKERiNa. 



[The present article is based prirparily upon the collection of plants made by me 

 during my connection with the United States Northern Boundary Commission. Those 

 collected in 1873 were secured along the northern border of Dakota, in the valleys of the 

 Eed Eiver of the North and of the Sonris or Mouse Ei ver ; and notably at Pembina, Dak. 

 The collecting season of 1874 was along the northern border of Montana, and iu the 

 Eocky Mountains, at latitude 49° N. 



With the species represented in my own collection, Professor Chickering has, at my 

 suggestion, incorxJorated those procured by my colleague of the British contingent of 

 the Survey, as ijublished by Mr. Dawson in his report (8vo, Montreal, 1875, pp. 351-379); 

 thereby presenting a fair idea of the flora of the belt of country surveyed by the 

 Boundary Commission. The species not represented in my collection, but derived 

 from Mr. Dawson's list, are marked with the asterisk (*). 



For papers on other portions of my collections, see this Bulletin, this Vol., No. 1, 

 pp. 259-292 ; No. 2, pp. 481-518; No. 3, pp. 545-661 ; No. 4, pp. 777-799.— Ed. J 



Tbis catalogue comprises 692 species, besides quite a number of vari- 

 eties, and is of much value and interest, not so much for the number of 

 new species enumerated as for the information supplied respecting the 

 range of many species known to be common farther east, west, or 

 south. 



A hasty comparison gives about 390 species found in New York or 

 New England, about 80 distinctively Western in their habitat, and about 

 215 which belong on the plains and the Eocky Mountain region. 



The LeguminoscE and the Compositce are, of course, very largely rep- 

 resented, and exhibit a number of species peculiar to the region. The 

 fact that but few collections were made previous to June will explain 

 the absence of many spring flowers, which, from the character of the 

 flora of summer, we should expect to find on that parallel. 



Allium stellatum, Nutt., Anemone Fennsylvanica, L., and Gamjmnula ro- 

 tnnclifolia, L., var. linifolia, were noticed as so abundant on the prairie as 

 to give character to the landscape. 



Yueca angusti folia, Nutt., was collected along the Missouri River, prob- 

 ably reaching here its northern limit. 



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