T. Holm — Studies in the Cyperacece. 309 



what remote, subtended by short, filiform bracts ; perigynium 

 elliptical, stipitate, many-nerved, glabrous. 



Nova Scotia : Halifax, collected by Professor John Macoun 

 (No. 16,678). The specimens were identified as var. strictce- 

 formis Bail., but they do not differ in any way from our Euro- 

 pean material, although the nerves of the perigynium are not 

 always as prominent as in the American plant. 



In comparing these North American varieties of Carex vul- 

 garis with the European, we notice as a prominent feature for 

 distinguishing these the strong development of the stipe in the 

 former, and sometimes to such an extent as making the peri- 

 gynia early deciduous. In the European forms the stipe is often 

 very distinct, but seldom as long and slender as in the Ameri- 

 can. In regard to the nervation, the perigynium shows, as 

 already stated, several variations, and a prominently many- 

 nerved perigynium seems to be the most frequent among the 

 representatives in this country. 



The beak is, as a rule, very short in all European specimens, 

 also in the American with the exception of the var. lipocarpa, 

 where it is quite prominent. 



There is, still, another plant which may belong here, but of 

 which the writer has only studied a scant supply of material. 

 This is O. Kelloggii W. Boott, which seems very near the 

 typical C. vulgaris, by the very short beak and stipe of the 

 perigynium. 



Carex sphacelata sp. n. 



Rhizome ascending, stolonif erous with persisting, deep reddish 

 brown scale-like leaves ; leaves about as long as the culm, rather 

 broad and flat, glabrous ; culm from 30 to 40 cm in height, erect, 

 stiff, triangular, glabrous, phyllopodic ; spikes three to five, the 

 terminal and, sometimes, the uppermost lateral staminate, the 

 others pistillate, contiguous or the lower ones remote, sessile or 

 short-ped uncled, erect, dense-flowered, subtended by foliaceous, 

 sheathless bracts with the blades broad, and longer than the 

 inflorescence ; scale of staminate flower linear-lanceolate, 

 obtuse, deep brown with pale midrib ; scale of pistillate flower 

 ovate-lanceolate, almost black with the mid vein obsolete, 

 shorter and much narrower than the perigynium ; perigynium 

 stipitate, erect, broadly elliptical, granular, two-nerved, pur- 

 plish-spotted above, whitish below, the beak short, entire ; 

 stigmata two, the style enclosed. 



Collected in Yukon: Colorado Creek, by Professor John 

 Macoun (No. 53,847). 



This species may be placed near 0. aguatilis Wahl. 



