8 Holm, The genus Carex in North -West America. 



The largest number of species has been collected in Washington 

 namely 96 i. e. Vigneoe: 42, Carices genuinae: 54. 90 species are 

 reported iVom Oregon i. e. Vigneae: 34, Car. genuinae: 56. 82 from 

 Alaska i. e. Vigneae: 27, Car. genuinae: 55. 87 from British 

 Columbia i. e. Vigneae: 35, Car. genuinae: 52. 65 from Idaho i.e. 

 Vigneae: 30, Car. genuiyiae: 35. 50 from Yukon i. e. Vigneae: 14, 

 Car. genuinae: 36. 



Öf these districts Washington and Oregon are those that have 

 been the most extensively explored, hence the large number of 

 species reported; what is botanically known of Alaska is mainly 

 the coast and adjacent islands; the interior is almost unknown; 

 thus the number of 82 species is proportionally large in comparison 

 with the small area explored. The same is undoubtedly the case 

 with Yukon, the flora of which is very little known, but appears 

 to be very rieh in species, not only of Cyperaceae , but also of 

 several other families. 



In this table we have , also , given the distribution of these 

 species in the Atlantic States and in the Rocky Mountains of 

 Colorado, from which it is to be seen that North-West America 

 has 62 species in common with the Atlantic States viz: Vigneae 

 29 and Car. genuinae 33, while 63 are represented in Colorado: 

 Vigneae 29 and Car. genuinae 34. 



The Brachystachyae are well represented in ourregion, especially 

 C. canescens, vitilis and tenella, all of which extend eastward to the 

 Atlantic coast. It is interesting to see that C. tenuifiora and loliacea 

 have been found in Alaska and Yukon, the latter having not before 

 been recorded from this continent. It was collected by Dr. Walter H. 

 Evans in Alaska (Kussiloff 1898) and by Professor John Macoun in 

 Yukon (Hunker Creek 1902). It seems stränge that C. arcta has not yet 

 been found in Alaska or Yukon, since it is quite frequent in 

 Washington extending throughout the continent to the Atlantic 

 States. The wide distribution of some of these species may, 

 furthermore, be illustrated by the fact that C. canescens and tenella 

 follow the Rocky Mountains as far South as Colorado. Among the 

 Neurochlaenae C. nardina seems to be the most frequent even 

 if it is confined to the higher mountains; in Washington it has 

 been collected on Mt. Adams (Mt. Paddo), Mt. Rainier, Mt. Stuart 

 and in the Wenatchee Mountains, besides in Oregon, the Cascade 

 Mountains, ,,Brokentop Mountain". In Alaska it has been found 

 at the Muir Glacier and in the Chilkat Region. It is not infrequent 

 in the Rocky Mountains and follows these southward to Colorado, 

 while eastward it extends through Alberta, Montana and Wyoming 

 to Fort Conger, Grinnell Land, and to the Hudson Bay Region. 

 The other species are mostly confined to the coast of Alaska, 

 except C. neurochlaena which, so far, has only been collected in 

 Yukon. C. glareosa extends eastward to Hudson Strait, C. lagopina 

 to the maritime rocks of Labrador, but none of these have been 

 found farther south; the latter has often been reported from the 

 Southern Rocky Mountains, but erroneously so, the specimens not 

 belonging to this species but to Dewey's C.petasata. — C. norve- 

 gica has been found in Maine and is not uncommon in New 

 Brunswick and Nova Scotia; the species has, also, been collected 



