KEPOKT OF THE STATE B0TANI8T 129 



7. Carex alopecoidea Tuckm. 



Stems 18-30' high, erect, acutely angled, flaccid, rough on the 

 angles above ; leaves about the length of the culm, erect-spread- 

 ing, 1^"-2Y wide, rough beneath and on the margins ; spike i'-li' 

 long, brown ; spikelets 6-10, mostly aggregated, or the lower 2 

 or 3 sometimes distinct, the lowest sometimes with a few-flowered 

 branch, ovoid or oblong, 2i"-3" long ; bracts bristle-shaped, the 

 1 or 2 lower J'-l' in length ; perigynia compressed-ovate, stalked 

 and truncate or subcordate at the base, obscurely nerved on the 

 upper surface, tapering into a flat rough-margined bifid beak, 

 more or less divergent at maturity ; scale ovate, acute or cuspi- 

 date, brown with whitish margins above the middle, nearly 

 covering the brown, or sometimes greenish, perigynium. 



Distinguished by its brown spike and compressed, stalked, 

 obscurely nerved fruit. Xot common. Mostly in the central 

 and western part of the State ; rare in the eastern part. June, 

 July. 



Spikelets more or less aggregated, light or deep green (brown- 

 ish in 13 when mature); perigynia compressed, sessile, distinctly 

 margined. 



Leaves 2"-4" wide 1 



Leaves less than 2" w ide 2 



1 Spikelets distinct below sparganioides. 



1 Spikelets contiguous or aggregated cephaloidea. 



2 Spikelets densely aggregated in an ovoid head . . . cephalophora. 



2 Spikelets contiguous in an oblong head or approx- 

 imate above, distinct below 3 



3 Perigynia orbicular-ovate Muhlenbergii. 



3 Perigynia ovate-lanceolate 4 



4 Beak of perigynia rough-margined rosea . 



4 Beak of perigynia smooth retrotlexa . 



8. Carex sparganioides Muhl. 

 Stems 18-36' high, erect, robust, smooth, except near the top; 

 leaves numerous, light green, smooth except on the edges, 2"— i' 

 wide, shorter or longer than the culm, the longest with liliform 

 extremities; spikes 2^'-6' long, strict; spikelets 5-12, the 3 or 4 

 upper globose, aggregated, the others more or less oblong, I'-V 

 17 



