8 
Holm, The genus Carex in North-West America. 
The largest number of-species has been collected in Washington 
namely 96 i. e. Vigneae: 42, Carices genumae: 54. 90 species are 
reported from Oregon i. e. Vigneae: 34, Car. genumae: 56. 82 from 
Alaska i. e. Vigneae: 27, Car. genumae: 55. 87 from British 
Columbia i. e. Vigneae: 35, Car. genuinae: 52. 65 from Idaho i. e. 
Vigneae: 30, Car. genuinae: 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. tenuiflora 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. 
E V a n s in Alaska (Kussiloff 1898) and by Professor John ]\I a c o u n 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 teneJIa 
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 
