perigynia but conspicuously exceeded by the beaks; perigynia flat, thin and 

 scalelike, barely distended over the achene, 4-7 mm. long. 1.2-2.6 mm. wide, 

 lanceolate to narrowly ovate-lanceolate, greenish-white to straw-colored, wing- 

 margined to the base, serrulate to below the middle, nerved on both faces, taper- 

 ing into a flat serrulate shallowly bidentate beak 1.2-2 mm. long; achenes lenti- 

 cular, oval-oblong, 1-1.5 mm. long, 0.5-0.7 mm. wide, brownish, short-stipitate. 



In open usually swampy places in seepage along streams and about ponds in 

 Ariz. (Apache and Pima cos.); Nfld. to B.C., s. to S.C., Ark., N.M., Ariz, and 

 Ore. 



Carex Bebbii Olney (in Colfax Co., N.M.) is similar to this species but the 

 perigynia are only about 3 mm. long. 



23. Carex festucacea Schkuhr. 



Culms cespitose, slender, erect, exceeding the leaves; principal leaf blades 2-5 

 mm. wide; spikes ovoid to subglobose, 6-10 mm. long, often distinctly clavate 

 at base, distinct but crowded in a compact cluster or separate in an inflorescence 

 3-6 cm. long; pistillate scales ovate, much shorter and narrower than the perigy- 

 nia, hyaline and lightly tinged with brown, acute or acuminate; perigynia 2.7-4 

 mm. long, half to three-fourths as wide, broadest at a third to half of their 

 length, the body broadly ovate to obovate, finely nerved on both faces, abruptly 

 narrowed to the beak; achenes lenticular, elliptic, light-brown, about 1.3 mm. 

 long, 1 mm. wide. ? C. normalis Mack. 



In wooded swamps and bottomlands, in mud along streams and in swales, 

 in Okla. (fide Fernald and Gleason); N.S. to N.Y., s. Mich, and la., s. to Fla. 

 and Okla. 



24. Carex albolutescens Schwein. Fig. 261. 



Tufted perennial; culms 25-75 cm. long, 1-2 mm. thick, sharply triangular, 

 erect; sheath venters broadly stramineous-hyaline; blades 1.5-3 mm. broad, 

 shorter than the culms, in most specimens rather stiffly ascending, the lower 

 ones extremely short; inflorescence interrupted-spiciform to monilifomi-spici- 

 form, 25-45 mm. long, 6-10 mm. thick, of 3 to 10 sessile basally attenuate 

 ovoid apically rounded ascending gynecandrous spikes 6—11 mm. long and 5-6 

 mm. thick; bracts absent; scales shorter than the perigynia; perigynia 30 to 50 

 per spike, 2.8-3.2 (-3.5) mm. long, 1.6-2.2 mm. broad, widest below the middle, 

 the body broadly obovate, widest above the middle, at anthesis stramineous, 

 very thin and distended only over the achene, winged, at maturity stramineous 

 and firmer, somewhat plano-convex, ventrally nearly veinless; beak 0.6-1 mm. 

 long, flat, bidentate, serrulate, at anthesis green, at maturity brownish, contrasting 

 with the body; achene lenticular, about 1.3 mm. long, 1 mm. wide. 



Infrequent or rare in moist or wet sand in bogs, low wooded swamps, edge 

 of water and in mud along streams and about ponds in e. (Polk, Leon and 

 Sabine cos.) and s.e. (Jeff"erson Co.) Tex., Apr.; otherwise said to occur in 

 Coastal States, N.S. to Fla.; also Mich., III., Ind., Mo., Tenn. and La. 



25. Carex Longii Mack. 



Tufted perennial, the rootstocks with very short internodes; culms sharply 

 triangular, 3-8 dm. long, erect, 1.5-2 mm. thick; sheaths short, the venters 

 mostly green and veiny except for the immediate vicinity of the orifice; blades 

 1.5-4 mm. broad, shorter than the culms, at least the lower ones often relatively 

 stiff and diverging slightly from the stem; inflorescence moniliform-spicate, 3-5 

 cm. long, 12-15 mm. thick, of 5 to 10 sessile basally abruptly attenuate narrowly 

 ovoid ascending gynecandrous spikes 7-1 I mm. long and 5-8 mm. thick; bracts 

 absent except occasionally a small setaceous one at the base of the lowest spike; 

 scales shorter and narrower than their perigynia; perigynia 55 to 80 per spike, 



512 



