\2 Holm, The genus Carex in North -West America. 



The Lejochlaefiae so profusely dispersed on the Atlantic coast 

 are rare in Northwest America, and C. polytrlclwides is the only 

 species that crosses the continent, besides that it occurs, also, 

 in the Rocky Mountains of Colorado. C. Geyeri shows a more 

 western distribution, while C. midticatdis is much rarer, being only 

 known from Oregon and California. C. Hendersonii , the only 

 member of the 1 axifi or a-gr oup , is confined to our region: damp 

 woods and wooded canyons in Washington, Oregon, British 

 Columbia and Vancouver Island. In passing to the DacfijJostachyae 

 we mect here with the very rare C. melcowcarjja from Alaska: 

 St. Lawrence Island; it is, also, reported from a few places in 

 northern Siberia. — C. concinna is only recorded from Yukon and 

 British Columbia,, from where it extends to Alberta, Montana and 

 Wyoming; a like distribution is exhibited by C. Bichardsonii 

 The Microcarpae are only represented by the very rare G. 

 cinnamomea from Oregon, where it has been found in upland 

 marshes and Springs near Kerbyville and south of Waldo in Oregon ; 

 it is, also, known from California. Of the ÄthrocJdaenae C. piire- 

 naica shows a remarkable wide distribution throughout the region 

 extending southward to Colorado, besides that it occurs, also, 

 in Colorado , in New Zealand , Caucasus and the Pyrenees , a 

 distribution which shows the danger in applying geographical 

 names to species. The other species C. nigricans does not occur 

 outside this continent, but is quite frequent in the mountains of 

 Alaska, Washington, Oregon and British Columbia, extending to 

 Alberta, Wyoming, Utah and Colorado. The Sfenocarpae so highly 

 developed in the European Alps and the Himalayas are quite well 

 represented in America. We have here the very rare C. lejocarpa, 

 collected at several stations in Alaska ; also the equally rare C. cir- 

 cinata from Alaska, the Olympic Mountains in Washington and 

 Queen Charlotte island. British Columbia. C. liizidaefoUa, a very 

 rare species, has been collected in mountain-swamps in Oregon, 

 besides that it occurs, also, in California, in the Sierra Nevada at 

 high allitudes, and in Utah. C. ahlata is, on the other hand, not 

 infrequent in Washington, Oregon and Idaho, extending to British 

 Columbia, Vancouver island, Utah and Wyoming; the variety 

 luzulaeformis has been reported from Mt. Paddo, Washington. 

 It is interesting to notice the presence of C. misandra in Alaska 

 (St. Lawrence island, St. Matthew island, Kotzebue and Norton 

 Sounds, Cape Nome and Port Clarence), but otherwise it has only 

 been found in the Hudson Bay region and in Colorado. None 

 of the Lamprochlaenae are frequent in this region, and C. rupestris 

 has only been found in the Chilkat Region and at Port Clarence; 

 it is altogether very rare in North America, having only been 

 reported from Colorado and the northern Canadian provinces. 

 C. ohtusata, rare in Yukon and Idaho, and known only from a 

 few stations in Colorado and Montana, is, on the other hand, 

 abundant in the prairie region and amongst the foothills through- 

 out Canada. Another very rare plant is C. pedata of which 

 only a very few specimens have been collected in Yukon and the 

 Chilkat Region, but nowhere eise on this continent; the species 

 occurs, however, in Greenland. Although C.^?>«"'>^('(ns not infrequent 



