T. Holm — Studies in the Cyperaeece. 301 



Art. XXXIII. — Studies in the Cyperacece ; by Theo. Holm. 

 XXI Y. New or little known Carices from Northwest 

 America. (With 18 figures, drawn from nature by the 

 author.) 



With the object of preparing a treatise of the genus Carex 

 as represented in the northwestern part of this continent the 

 writer has examined several very extensive collections, con- 

 taining a vast number of specimens, among which some few 

 have been observed as imperfectly understood or as hitherto 

 und escribed. Inasmuch as the treatment of the genus in a 

 subsequent paper will be from a geographical point of view, 

 we prefer to publish the diagnoses of the new species sepa- 

 rately with some remarks upon their affinities. 



These species are : 



Carex limncea sp. n. (figs. 1-3). 



Rhizome vertical with ascending shoots and light brown, 

 fibrillose leaf-sheaths ; leaves a little shorter than the culm, 

 narrow, but flat, glaucous, scabrous along the margins ; culm 

 about 60 cm in height, erect or slightly curved above, very 

 slender, triangular, scabrous, phyllopodic ; spikes 3 to 5, but 

 mostly 1, the terminal staminate or, sometimes, androgynous, 

 the lateral pistillate, the uppermost contiguous, the lowest 

 remote, sessile to shortly peduncled, erect, not very dense- 

 flowered, cylindric, about 2 cm in length, subtended by sheath- 

 less, foliaceous bracts, the lowest one often exceeding the 

 inflorescence ; scale of staminate spike lanceolate, light pur- 

 plish-brown with green midvein ; scale of pistillate spike oblong, 

 obtuse, black with hyaline apex and greenish midvein, shorter 

 than the- perigynium ; perigynium stipitate, slightly spreading, 

 narrowly elliptical,* granular, plano-convex, prominently many- 

 nerved on the outer (convex) face, three-nerved on the inner, 

 pale green with a black, entire and very distinct beak ; stig- 

 mata 2, style long and exserted. 



Oregon : Crater Lake National Park, Cathedral spring, col- 

 lected' by Mr. F. V. Coville, September, 1902 (No. 1156) ; Four- 

 mile Lake, Klamath County, in meadows, and between Dia- 

 mond and Crescent Lakes, Cascade Mountains. 



The graceful habit of this species reminds us more of C. 

 rhoniboidea than of C. vulgaris, but when we, nevertheless, 

 prefer to place it nearer O. vulgaris it is on account of the 

 structure of the perigynium, narrowly elliptical and promi- 

 nently many -nerved. 



Am. Jour. Sci. — Fourth Series, Vol. XX, No. 118. — October, 1905. 

 21 



