T. Holm — Studies in the Cyperacece. 301 



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

 XXI. ~New or little known species of Garex. (With figures 

 in the text, drawn by the author.) 



Carex neurochlcena sp. n. (figs. 1-2). 



Rhizome slender, ascending, stoloniferous, the leafsheaths 

 persisting, light brown ; leaves shorter than the culms, very 

 narrow, carinate, scabrous ; culms up till 24 cm in height, curved, 

 almost capillary, trigonous, scabrous below the inflorescence, 

 otherwise glabrous, phyllopodic ; spikes two to four, gynsecan- 

 drous or the lowest one sometimes purely pistillate (fig. 1), small 

 and few-flowered, roundish, contiguous or the lowest one remote, 

 reddish brown, the bracts inconspicuous or the lowest one with 

 a filiform blade much shorter than the inflorescence ; scales 

 broadly ovate, those of the staminate flowers acute, the others 

 obtuse, reddish brown with green midrib and Iryaline margins ; 

 perigynium (fig. 2) longer, but narrower than the scale, sessile, 

 slightly spreading, broadly elliptical, attenuated at both ends, 

 plano-convex, wingless, prominently nerved, greenish, the 

 beak short, slit on the convex face ; stigmata two. 



Collected above Rink rapids, Yukon River in Yukon, by 

 Professor John Macoun (No. 53,879). 



This species belongs to the NeurochZoznm. 



Garex vagans sp. n. 



Rhizome horizontally creeping, forming dense mats, the 

 leaf-sheaths persisting, light brown ; leaves glaucous, shorter 

 than the culms, very narrow, carinate, scabrous ; culms numer- 

 ous, from 20 to 30 cm in height, very slender and weak, triangu- 

 lar, scabrous, phyllopodic ; spikes three to five, androgynous or 

 the lateral purely pistillate, small and few-flowered, sessile, form- 

 ing an interrupted, spicate inflorescence about 2 cm in length, 

 the bracts short and inconspicuous ; scales ovate, acute, reddish 

 brown with green, broad midrib and hyaline margins, shorter 

 than the perigynium ; perigynium sessile, somewhat spreading 

 at maturity, ovoid, plano-convex, wingless, two-ribbed (the 

 marginal), light brown, minutely scabrous along the very short 

 beak, deeply slit on the convex face ; stigmata two. 



Collected in Oregon : Steins Mts., flat opposite Andrews, 

 alt. 1950% by Mr. John B. Leiberg (No. 2558). 



In aspect much like G. occidentalis Bail., but in this the 

 spikes are more dense-flowered, the perigynium elliptical, stipi- 

 tate, spongious at the base and the beak prominently bidentate. 



Am. Jour. Sci.— Fourth Series, Yol. XVII, No. 100.— April, 1904. 

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