T. Holm — Studies in the Gyperacece. 271 



Gpauciflora Lightf. 



Abundant in bogs, Sitka. 



C. utriculata Boott. 

 On bog, Sitka. 



G. physocarpa Presl. 



Common at Kadiak on rather dry mountain side at an eleva- 

 tion of 500 feet. The specimens seem better referable to this 

 species than to G compacta R. Br., but neither this or G 

 physocarpa is well understood, thus the identification is very 

 uncertain. 



In considering the geographical distribution of some of these 

 species, the following are circum polar : G. ccmescens, G vul- 

 garis, G. salina and partly, also, G. livid a ; G. cryptocarpa is 

 very common on the western and eastern coast of Bering Sea, 

 and extends as far south as Japan and China, but it is other- 

 wise known only in Greenland, Iceland, Faroe Islands and a 

 few places on the Norwegian coast ; C. stygia, which seems to 

 be very abundant in several parts of Alaska has not, so far, 

 been recorded with certainty from other countries than Fin- 

 mark in Norway. C. tenella, which has a very wide distribution 

 in North America, from the Atlantic to the Pacific Ocean, 

 does not occur in Greenland, is rare in Scandinavia and Arctic 

 Russia, has not yet been reported from Arctic Siberia, and is 

 first met with again in Kamtschatka. C. macrocep/iala and 

 G. Gmelini are only known from the eastern and western 

 coast of Bering Sea but both extend as far south as Japan, 

 the former even to China ; G. macrochceta has been collected 

 in many places on the Alaskan coast, but not, so far, on the 

 Asiatic side, unless Kjellman's specimens from Konyam Bay 

 may be referred to this rather than to C. podocarpa R. Br. 

 G. Macloviana shows an exceedingly wide distribution rang- 

 ing from Alaska southwards to Magellan, besides that it occurs, 

 also, on Sandwich Islands, in Greenland and Arctic Europe. 

 C. nigella is only known from Alaska and the Rocky Moun- 

 tains in middle Colorado ; G. interrupta is only known on this 

 side of Bering Sea: Alaska and Oregon. 



The very considerable material of the rare G. circinata 1 

 which was placed at our disposal, induced us to study its affin- 

 ities, inasmuch as we received, also, a number of excellent 

 specimens of its nearest ally, the equally rare G lejocarpa 

 C. A. Mey., for which the writer is indebted to Mr. James M. 

 Macoun, who, some years ago, detected this species on the 

 Pribilof Islands in Bering Sea. 



These two species resemble each other very much, but are, 

 nevertheless, readily distinguished by the following characters : 



