Holm, The genus Carex in North-West America. 
11 
and Yukon extending from there to the Atlantic coast and following 
the Rocky Mountains south to Colorado. Typical C. aquatilis has 
been collected in Alaska (Port Clarence and Chilkat Region) and 
in Yukon, besides that it is known also from the northern Atlantic 
coast, sometimes accompanied by the variety epigejos. The rare 
C. interrupta from Washington and Oregon forms an interesting 
transition between the aquatilis- and acutina-grou\). C. lenti- 
cidaris, more widely distributed in the east, has been found in 
Alaska (Nome City and the Chilkat Region) and Idaho (Priest 
Lake). C. Sitchensis has been rediscovered in Alaska at several 
stations near the coast, besides in a few places in Washington 
and Oregon. The ränge of C. Nehrascensis, a species of the Rocky 
Mountain region, has been extended to our region, but is not 
frequent. It is associated with two allies in Washington: C. eury- 
carpa and oxycarpa. The more Southern C. laciniata has been 
collected in Oregon, Banks of Rouge River, Grants’ Pass; another 
Southern species C. scoputormn is known now from Washington 
and Oregon. 
The Aeorastachyae are exceedingly well represented by 
characteristic and abundantly occurring species. We meet here 
with the arctic C. suhspathacea. collected on the Islands of St. Paul 
and St. Lawrence besides at Port Clarence; the species occurs, 
furthermore, in the Hudson Bay Region. C. salina var. cuspidata 
has been found on St. Paul Island and at Kussiloff on the Alaskan 
coast, but is much more frequent farther eastward on the Atlantic 
coast and near Hudson Bay. Very common are C. cryptocarqja 
and macrochaeta, both of which are known also from the Asiatic 
coast of Bering Strait; equally abundant is C. aqjerta, though ab¬ 
sent from Alaska; it extends eastward to Montana. It seems 
Strange that C. maritima, known from New England and Hudson 
Bay, does not occur within our region. On the other hand C. 
Magellayiica, limosa and rariflora, all known from the Atlantic 
coast, have been found at several stations, accompanied by the 
characteristic C. stygia, so very abundant in Alaska. 
We notice the occurrence of C. hicolor in Alaska {Muir inlet, 
Glacier Bay) and Yukon, and the species is known from nowhere 
eise in America. Very frequent is, on the other hand, C. aurea, 
even if it has not yet been found in Alaska; it is distributed 
throughout the continent and reaches the Atlantic coast, besides 
that it follows the Rocky Mountains south to Colorado. The more 
northern C. livida has been collected at several stations in Alaska 
and British Columbia, besides Alberta, but is absent from the 
other States, although it appears again on the Atlantic coast in 
Maine, Vermont etc. The very local C. Craivei has been detected 
at Fort Colville in Oregon, but this is the only place from where 
it is known within our region. C. vaginata is in Alaska only 
known from Port Clarence, and from Yukon, but from there it 
extends through British Columbia and Alberta to the northern 
Atlantic States. Very interesting is the discovery by Air. Suks- 
dorf, of C, polymorpha in the mountains of Skamania, Washington, 
a species that is otherwise only known from the Atlantic coast, 
from Alassachussetts to North Carolina. 
