REPORT OF THE STATE BOTANIST 



193 



tapering from a stalked base into a long cylindrical, bidentate 

 beak, about twice the length of the ovate lanceolate, pointed or 

 rough-awned scale ; achenium nearly as broad as long, with a 

 mammillate protuberance on each angle, and a long curved style. 

 (C. lupulina var. polystachya Schw. and Torr.) 



Marshes. Rare. Yates and Putnam counties. July. 



The long spikes and peculiar achenia characterize this species. 



Perigynia moderately or much inflated, ascending, divergent 

 or deflexed. 



Staminate spike single (rarely 2), clavate, stalked or sessile, 

 rarely androgynous ; pistillate spikes 1-5, globose, oblong or 

 short cylindrical, sometimes sterile at the apex, compactly sub- 

 densely or alternately flowered, sessile or peduncled, erect or 

 spreading, the upper contiguous or approximate, the others dis- 

 tinct or scattered or all scattered, green or yellowish-green at 

 maturity ; bracts leaf-like, with conspicuous or obsolete sheaths, 

 erect or divaricate, longer than the culm ; perigynia ovoid, lan- 

 ceolate or awl shaped, nerved, mostly smooth with a short notched 

 or long bifurcate beak. 



Spikes short-cylindrical, leaves involute extensa. 



Spikes globose or ovoid, distant, bracts sheathing 1 



Spikes globose or oblong, contiguous above, bracts 



obsolete , 2 



1 Spikes 4-8, distant, perigynia awl-shaped Collinsii. 



1 Spikes subdensely or densely flowered, perigynia not 



awl-shaped 3 



3 Leaves 2"-6" wide folliculata. 



3 Leaves about I" wide Michauxiana. 



2 Spikes 3-8-flowered, leaves involute oligosperma. 



2 Spikes more than 8-flowered, leaves not involute 4 



4 Perigynia deflexed when mature, its beak bent flava. 



4 Perigynia with a straight beak 5 



5 Perigynia small, with a short, minutely notched beak . . CE leri. 



5 Perigynia much inflated, long & 



6 Spikes 15-30 flowered, perigynia 25-30 nerved Grayii. 



6 Spikes 3-12 flowered, perigynia 15-20 nerved intumescens. 



117 Car ex Grayii Carey. 

 Stems 12-30 7 high, stout, acutely angled above, smooth ; 

 leaves surpassing the culm, 2"-3" wide, rough, light green ; stacn- 

 25 



