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



and Yukon extending from there to the Atlantic coast and tbllowing 

 the Rocky Mountains south to Colorado. Typical C. aquaülis 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 e])igpjos. The rare 

 C. interrupta from Washington and Oregon forms an interesting 

 transition between the aquaülis- and acutina-grovi\>. C. lenti- 

 cularis, more widely distributed in the east, has been found in 

 Alaska (Nome City and the Chilkat Region) and Idaho (Priest 

 Lake). C. Siichensls has been rediscovered in Alaska at several 

 stations near the coast, besides in a few places in Washington 

 and Oregon. The ränge of C. Nebrascensis, 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: ü. eunj- 

 carpa and ojnjcarpa. The more southern C. lacinlata has been 

 collected in Oregon, Banks of Rouge River, Grants' Pass; another 

 southern species C. scopulorum is known now from Washington 

 and Oregon. 



The Aeorastachijae are exceedingly well represented by 

 characteristic and abundantly occurring species. We meet here 

 with the arctic C. subspathacea. 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. cuspldata 

 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. crijptocarpa 

 and ynacrochaeta, both of which are known also from the Asiatic 

 coast of Bering Strait; equally abundant is C. aperta, 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. 

 MayeUayiica, limosa and rariflora, all known from the Atlantic 

 coast, have been found at several stations, accompanied by the 

 characteristic C stygla, so very abundant in Alaska. 



We notice the occurrence of C. blcolor 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 ü. 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. Crawei 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 Mr. Suks- 

 dorf, of C. pohßnorpha in the mountains of Skamania, Washington, 

 a species that is otherwise only known from the Atlantic coast, 

 from Massachussetts to North Carolina. 



