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



on Arakamtscetschen Islands in Eastern Asia. C. amplifolia, very 

 rare in California, has been found at several stations in Washington, 

 in swamps and along mountain-streams , but is less frequent in 

 Idaho and Oregon. 6'. flava and Oederi are the only species of 

 Spirostachi/ae that have, so far, been observed in our region, but 

 it is quite interesting to notice that the former is accompanied by 

 the variety lepidocarim. C. Oederi is the most frequent of these, 

 at least in Washington, and seems altogether to be more widely 

 distributed in the western States, than in the eastern. In passing 

 to the Echinostachj/ae we meet here with C. microglochin recently 

 discovered in Alaska at Port Clarence, besides that it has, also, 

 been found in British Columbia; we might State at the same time 

 that the species has, also, been observed in Colorado and in the 

 Hudson Bay region, but nowhere eise on this continent, although 

 it has been collected on the west-coast of Greenland. C. pauciflora 

 is, also, rare in our region, known only from Yes Bay, Virgin Bay, 

 Sitka and Vancouver Island, besides a few stations in Washington; 

 it occurs, however, throughout Canada and the northern United 

 States. None of the other members of the grex have been found 

 in Alaska, but in some of the other western States, though only 

 at a very few stations. 



The Phijsocarpae, on the other hand, are exceedingly well 

 represented in our region. and especially on the Alaskan coast. 

 C. amhusta has been found at Sitka, Kukak Bay and on St. Lawrence 

 Island ; C. rotundata occurs near Nome City ; C. utriculata^ abounds 

 throughout the region, and C. phijsocarpa is very common in Alaska 

 and British Columbia. C. plvjSoMaena, a very characteristic species, 

 is only known from Yukon; the high northern ('. pidla has been 

 collected at Norton and Kotzebue Sounds, in the Chilkat region and 

 Yukon, while C. mirata seems to be frequent in Washington, Idaho 

 and Oregon, but has not, so far, been observed either in Yukon 

 or in Alaska. The very rare 6'. compada has been recorded from 

 Alaska: Cape Nome, Norton Sound, Port Clarence and St. Michael 

 Island from where it extends eastward to the Hudson Bay Region. 

 The monostachyous G. Breweri of the Physocephalae has been 

 found in the mountains of Washington and Oregon, on alpine 

 slopes near the snow; the species occurs, also, in California. The 

 Rhiincliophorae are in our region only represented by C. monile, 

 which seems to be very rare, especially the typical plant. 



B. Types characteristic of North -West America. 



Carices brachystachyae. 



Of these C. Bonanzaensis is the only type of this region; it 

 is an ally of C. canescens but quite distinct from this by the 

 shining brown color of the scales which are much shorter than the 

 perigynium; the latter is plano-convex, broadly eUiptical, several- 

 nerved on both faces and the minute beak is slit on the convex 

 face. C. arcta is an American species, but is not confined to the 

 northwestern parts of the continent. In regard to the systematic 

 Position of this species within the grex, it may be placed between 

 C. canescens and vitiJ/is. Judging from the ample representation 



