GENEEAL EEPOET. xlvii 



cent, belong to the plants of widest range. The flora of the Wahsatch and 

 Uintas contains 75 per cent, of the arctic and 81 per cent, of the subarctic 

 species ; 63 per cent, of the first and one-half of the last are also upon the 

 Atlantic side of the continent. 



Among the 101 alpine and 77 subalpine species there is a comparatively 

 small proportion of the arctic or higher northern plants. But 46 arctic 

 species were collected in alpine localities and but 19 others could even be 

 considered as subalpine, while but 20 of the subarctic species were either 

 alpine or approaching it. 



In regard to the range of the genera but little can be said. Of the 439 

 genera of the Catalogue 148, including 288 species, are not found in the 

 United States east of the Mississippi. Of the remaining genera, which are 

 thus found, 109 have their 146 species also all eastern, 96 with 297 species 

 include among them none that occur east of the Mississippi, and 86 are 

 divided in this respect, including 182 eastern and 323 western species. 



No attempt has been made at giving the range of species beyond the 

 limits of North America. Mr. Olney states that of the forty-five species of 

 Carex, named in the Catalogue, fourteen are found ia both Europe and Asia, 

 five in Europe only, two in Asia only, and two in South America, of which 

 one also occurs in Europe and Asia. Two of these European species are for 

 the first time identified as American in this collection. The range of the 

 mosses only is given as fully as it could be ascertained. 



Ceyptogamic Flora. The atmospheric conditions are incompatible 

 with even an ordinary development of cryptogaraic vegetation in the Basin. 

 Ferns are rare, occasionally found in the higher mountains but in many of 

 the ranges wholly absent. In the Wahsatch and Uintas they are more fre- 

 quent and in a larger number of species. Only twelve species were collected, 

 five of which were confined to Utah. Nine of these range from the Atlantic 

 or from the Grreat Lakes to the Pacific, of which three are arctic and two 

 subarctic. 



No opportunity for the collection of mosses was neglected and the 

 material has been most patiently and thoroughly elaborated by Mr. James, 

 who returns an unexpected number of species. Some of them, like the 

 Grimmia, were attached to the driest san-burned rocks of the valleys, others 

 were found only in early spring under sage-brush and in the meadows near 

 Carson City. Far the larger number were collected on the wet banks of 



