262 T. Holm — Studies in the Cyperacece. 



According to Gray's New Manual of Botany (1908) 

 C. macrokolea Steud. is considered specifically distinct 

 from C. glaucescens by the squamae being short-awned, 

 and the perigynium strongly ribbed ; moreover the figure 

 (1. c. p. 248) shows the pistillate spikes to be always ses- 

 sile; the geographical distribution is the same, but 

 extends to Texas. The section is thus confined to the 

 Southern States, and shows in several respects some affin- 

 ity to the Limosae as regards the phyllopodic culms, the 

 bracts being evaginate, etc., as already pointed out by 

 Drejer (1. c.) ; but the habit is much more robust, similar 

 to large specimens of C. cryptocarpa. 



Limoscd. 



In this section we have C. litt oralis Schw., C. limosa L., 

 C. laxa Wahlenb., C. rariflora Sm., C. stygia Fr., and C. 

 Magellanica Lam. They all are phyllopodse, and bog 

 plants. With regard to their geographical distribution 

 C. littoralis is a very local plant in the Atlantic States 

 from Connecticut and southward, Maryland for instance. 

 C. limosa is widely distributed in the northwestern cor- 

 ner of this continent: Yukon, British Columbia, Wash- 

 ington, Idaho and Oregon ; it occurs also in the Atlantic 

 States, in arctic Europe (Finmark and Russia) and 

 Siberia ; farther south the species reaches Great Britain, 

 the Alps and Pyrenees, Altai and Baikal Mountains, 

 Korea, etc. C. laxa, on the other hand, is a very rare 

 species in Northern Europe : Finmark, Lapmark south to 

 Jamtland, arctic Russia, eastern Asia from Amur-district 

 south to Japan. 



C. rariflora is circumpolar, and rare outside the arctic 

 regions; it has, however, been found in Quebec, Maine 

 (Mt. Katahdin), and in eastern Asia it extends as far 

 south as northern Japan. Its near ally C. stygia is not 

 rare in Alaska, and has recently been found in British 

 Columbia (Queen Charlotte Island); in Europe it is 

 known from a few stations in Finmark and arctic Russia. 

 A very extensive distribution is shown by C. Magellanica, 

 throughout the northern hemisphere, including the arctic 

 coast of Finmark and Russia; as indicated by the name 

 the species occurs also in the most southern part of 

 South America. 



