50 CYI'KKACKAE 



oblong, pointed but beakless, 2-ranked : scales cuspidate. — Near Lake 

 City and Martin City. Uncommon. May-June. 



20. C. granularis Muhl. l°-2.l° high, glaucous : leaves fiat, V/'-i" 

 wide : staniinate s>pike solitary : pistillate spikes 2-4, erect, compact, 

 sliort-oblong, \' or less long; perigynia 1" long, ovoid, short-beaked and 

 strongly nerved.— Moist woods and meadows, especially in the northern 

 part. Quite frequent. May-June. 



21. C. oligocarpa Schk. Like C. amphibola : pistillate spikes A"-P>" 

 long, looser flowered : perigynia V-\\'' long, abruptly contracted into 

 a short beak, many-striate. — Common in rich woods. April-June. 



22. C. Hitchcockiana Dewey. Culms erect, l°-2° high : leaves 

 about 2'^ wide, their sheaths scabrous-pubescent: pistillate spikes 2-4, 

 like the last: perigynia ovoid, stoutly beaked, shorter than the rough- 

 awned scale. — Frequent in rich woods from Courtney to Sibley. May- 

 June. 



23. C. Meadii Dewey. Usually less than 1° high : stamiuate spike 

 solitary, stout, long-stalked : pistillate spikes 2-3, stout, densely several- 

 many-flowered, Z'^-\2'' long: perigynia 1^-2'^ long, oblong, many- 

 nerved, the beak usually strongly bent, longer than the scale. — Common 

 on prairies and in dry oak woods, especially in the southern part. May- 

 June. 



24. C. laxiflora Lam. Culms ()'-2° high, glabrous : leaves 3'' or less 

 wide: staininate spike stalked: pistillate spikes loosely few-flowered, 

 I'-V long : perigynia triangular, 1 '/' long, obovate, strongly nerved, with 

 a much bent beak : scales scarious-margined. — A common species in 

 woods and thickets. May-June. 



Var. blanda (Dewey) Boott. Lower : pistillate spikes V or less long, 

 more densely flowered, the upper sessile and contiguous to the inconspicu- 

 ous sessile staminate spike. — Very common in open woods and meadows. 



Var. varians Bailey. \},°~2\° high : leaves often 3]" wide : pistillate 

 spikes V-\Y long, the two upper sessile and contiguous to the usually 

 sessile staminate spike. — Kich copses in the northeastern portion. Not 

 uncommon. 



Var. patulifolia (Dewey) Carey. Glaucous : leaves 3"-^" broad : 

 staminate spike conspicuous, peduncled : pistillate spike often 1' or more 

 long, loosely flowered : perigynia beak nearly straight. — In rich woods 

 near Levasy. Kare. 



25. C. Albursina Sheldon. 1° or less high : leaves numerous, 6"-18'" 

 wide, the br.icts similar and much longer than the loosely-flowered i>istil- 

 late spikes : staminate spike nearly se.^sile : perigynia 3"-4'' long, strongly 

 nerved and short-beaked. — A strongly marked species found (juite abund- 

 antly in the wet rocky bluff woods at Courtney. May-June. 



26. C. Pennsylvanica Lam. C^'-l'V high, strongly stoloniferous : 

 leaves narrow and somewhat involute : staminate spke brownish-purple- 

 nearly sessile, Y-V long: pistillate spikes 1-3, eassile, short and few- 



