40 KEPOKT OF THE STATE BOTANIST. 



lets are often S'-i" apart, the perigynia nerveless or obscurely 

 nerved on the upper surface only, and widely divergent at matur- 

 ity, agreeing with a form occurring in "West Albany and Junius, 

 having slightly wider leaves (i" wide or less) which connects 

 the variety and the type. 



Low grounds along streams and shores. Long Island. May, 



June. 



2 1 . Carex seorsa Howe . 



Stems l°-2'' high, slender, erect, smooth; leaves mostly a 

 little shorter than the culm, l"-li" wide, rough-margined ; spike 

 1-2^' long, erect, green ; spikelets 4-6, 6-20 flowered, globular 

 or oblong, 2"-24" long, the upper two approximate, the others 

 scattered, the lowest ^'-1' distant from the next above, usually 

 subtended by a bristle form bract, rarely by a leafy one 1^' long ; 

 the terminal spikelet pistillate at the apex, rarely wholly stami- 

 nate ; perigynia small, broadly ovate, nerved on both sides, 

 contracted into a short, smooth-margined, bifid beak, much 

 longer than the green and brown white-margined subacute scale. 



Swampy woods and groves. May, June. Lansingburgh, Rens- 

 selaer county. Howe. East Islip, Suffolk county, and near 

 Rome, Oneida county. Peel: 



This species grows in tufts and is separated from C. interior 

 by its taller, stouter culms, its longer spikes, more numerous and 

 more scattered spikelets, and by its smooth-beaked perigynia. 



Spikelets 2-15 or more, approximate or more or less aggregated, 

 ovate, obovoid, globular or clavate, sessile, erect or spreading, 

 green, fulvous or silvery-green, whitish or tawny ; perigynia 

 concavo-convex, ovate, obovate or lanceolate, mostly nerved, 

 prominently wing-margined, with a flat mostly rough-margined 

 bifid beak. 



Perigynia ovate-lanceolate, narrowly winged mirabilis. 



Peric^ynia linear-lanceolate or narrowly lanceolate . . 1 



Peritrynia orbicular-ovate, broadly winged 2 



1 Spikelets in a dense cluster partly concealed by long 



bracts sychnocephala. 



1 Spiktlcts contiguous, bracts not concealing them ... 3 



3 Spikelets densely aggregated, perigynia widely 



spreading or reflexed cristata. 



3 Si>ikelet8 contiguous or aggregated, perigynia not 



refle-xed 4 



