T. Holm — Studies in the Cyperacew. 21 



the style not exserted. Only known from Siskyiou County, 

 California : Mt. Eddy * 



Scirpus Macounii sp. n. (fig. 9). 



Perennial with ascending shoots, the leaf-sheaths not fibril- 

 lose ; basal leaves much shorter than the culm, flat, about l cm 

 wide, the midrib distinct, very scabrous below, glabrous above, 

 light green ; cauline leaves with long sheaths ; culm erect, tri- 

 angular scabrous, leafy to about the middle, one meter in 

 height, phyllopodic ; inflorescence umbellate, decompound, the 

 primary rays scabrous, from 1 to 7 cm in length subtended by 

 long, foliaceous involucral bracts and small, tubular prophylla 

 with or without a short setiform blade ; secondary rays many 

 but much shorter, only 1 to 3 cm in length, subtended by scale- 

 like leaves and minute prophylla; spikes 3 to 6 together, 

 sessile, cylindric, about half a centimeter in length ; scales 

 greenish brown, lanceolate, acuminate, the midrib stout and 

 extended into a short mucro ; setse 6, straight, a little longer 

 than the caryopsis, downwardly barbed to near the base ; 

 stamens 2, seldom 3 ; stigmata 2 or 3 ; caryopsis light brown, 

 roundish in outline, compressed triangular in cross-section. 



Evidently a near ally of S. sylvaticus, but in this the scales 

 are obovate-oblong, slightly emarginate with a short mucro 

 from the extended midrib, the stamens are only 2 in number, 

 the setse 4 and, the stigmata nearly always 2, besides that the 

 spikes are shorter and more oval. 



III. The Geographical Distribution. 



The Cyperacew of the Chilliwack Yalley represent certain 

 types of wide geographical range, some of which are arctic : 

 Carex nardina, f estiva, scirpoidea, Eriophorum gracile and 

 Scirpus cwspitosus, while Carex canescens and Eriophorum 

 angustifolium are even circumpolar. Some others are con- 

 fined to this continent, but extend as far east as the Atlantic 

 slope, for instance Carex Bebbii, interior, CrawfordM, Dewey- 

 ana, arcta, stipata, teretiuscula and polytrichoides, while C. 

 losviculmis, Mertensii, spectabilis, vulgaris var. lipocarpa, 

 dives, Hendersonii, nigricans, ablata and Rossii are mostly 

 western species, sometimes, however, extending eastward to 

 the Bocky Mountains. Eleocharis palustris is cosmopolitan, 

 and E. ovata is known from Middle Europe, Caucasus and 

 Dahuria, besides from Australia. 



Moreover, some of these species occur as alpine farther south, 



* C. psexidoscirpoidea Eydberg has been described in the Flora of Montana 

 (p. 78) as a segregate from C. scirpoidea Michx., hut we find none of the 

 characters sufficient for segregating the Montana plant from the type ; more- 

 over, the description is incorrect, for instance the perigynium is said to be 

 " densely hirsute" instead of merely "pubescent," etc., besides that the 

 name " Greek-Latin-Greek " is not admissible. 



