SEDGE FAMILY. 

 34. Carex riparia Curtis. River-bank Sedge. 



Carex riparia Curtis, Fl. Lond. 4: pi. 60. 1821. 



Glabrous, pale green, culms stout or rather slender, 

 smooth, or somewhat rough above, erect, 2-3^ tall 

 Leaves elongated, sometimes nodulose, slightly sca- 

 brous, somewhat glaucous, 3"-6" wide, about equal- 

 ling the culm; lower bract similar to the leaves, the 

 upper mostly narrower and shorter; staminate spikes 

 1-5; pistillate spikes 2-5, cylindric, \W-tf long, about 

 4" in diameter, the upper erect, sessile or nearly so, 

 the lower more or less stalked and sometimes spread- 

 ing or drooping; perigynia narrowly ovoid, firm, 

 scarcely inflated, ascending, tapering gradually into a 

 short 2-toothed beak, the teeth divergent; scales 

 lanceolate or oblanceolate, long-aristate or acute, the 

 lower longer, the upper equalling or shorter than the 

 perigynia; stigmas 3. 



In swamps, Newfoundland to James' Bay and Manitoba, 

 south to Florida, Louisiana, Texas and Idaho. Also iii 

 Europe. May-Aug. 



Carex acutiformis Ehrh. Swamp Sedge. 



Carex acutiformia Khrh ; 

 Carex paludasa Gooden. Tran 



1794- 



inn. Sor. 3: 



Culms stout, erect, sharp-angled, a-3 tall, 

 smooth below, often rough above. Leave* a)("~ 

 6" wide, flat, pale green, equalling or iomctiMi 

 exceeding the culm; lower bracts similar to the 

 leaves, the upper short and narrow; 

 spikes 1-3, stalked; pistillate spikes 3-5, 

 rowly linear-cylindric, i > / -3 / long. a"-a>i " t! 

 the upper sessile or nearly so and erect, the others 

 slender-stalked, spreading or drooping; perifjrnia 

 ovoid, i%" long, not inflated, strongly many- 

 nerved, tapering into a very short and minutely 

 2-toothed beak ; scales awn-tipped, longer than the 

 perigynia or the upper equalling them; stigmas j. 



In swamps and wet meadows, eastern 

 setts. Naturalized from Europe. Junc-An*. 



36. Carex Shortiana Dewey. Short's Sedge. 



Carex Shortiana Dewey, Am. Journ. Sci. 30: 60. 1836. 



Glabrous, culms rather slender, erect, rough 

 above, i-3 tall, usually overtopped by the upper 

 leaves. Leaves elongated, roughish, 2 // -2> // 

 wide; bracts short, narrow, rarely much exceed- 

 ing the spikes; spikes 3-7, linear-cylindric, densely 

 many-flowered, Yz'-\Yz f long, i#"-2" in diam- 

 eter, erect, the lower stalked, the uppermost 

 staminate below for about one-half its length; 

 perigynia dark brown at maturity, compressed, 2- 

 edged, orbicular or obovate, nerveless, slightly 

 wrinkled, abruptly and minutely beaked, equal- 

 ling or shorter than the scales, which are hyaline, 

 scarious-inargined, ovate or oblong-lanceolate, 

 acute or obtuse and persistent; orifice of the pcri- 

 gynium entire or very nearly so; stigmas 3. 



In moist meadows and thickets, Pennsylvania to 

 Virginia and Tennessee, west to Illinois, Missouri 

 and the Indian Territory. May-July. 



20 



706.) 



