70 



CYPBRACEAB. 



25. Scirpus Peckii Britton. Peck's Bul- 

 rush. (Fig. 633.) 



Scirpus Peckii Britton, Trans. N. Y. Acad. Sci. n: 82. 

 1892. 



Perennial by rootstocks, culms slender, trian- 

 gular, i^-3^ tall, leafy. Leaves elongated, 

 2 // -5 // wide, rough-margined, the upper overtop- 

 ping the culm, those of the involucre 3-5, the 

 longer of them exceeding the inflorescence; umbel 

 i-2-compound, large; spikelets cylindric, obtusish, 

 3 // -5 // long, in capitate clusters of 2-10 at the ends 

 of the raylets or some of them distinctly pedun- 

 cled; scales dark brown, keeled, mucronate, falling 

 early; bristles 4-6, downwardly barbed from be- 

 low the middle to the summit, longer than the 

 achene; style 3-cleft; achene 3-angled, }" long, 

 oblong, narrowed at each end, slender-beaked. 



In swamps, Connecticut and New York. July-Sept. 



26. Scirpus divaricatus Ell. Spreading Bulrush. (Fig. 634.) 



Scirpus divaricatus Ell. Bot. S. C. & Ga. i: 88. pi. 2. 

 f. 4. 1816. 



Perennial (?). Roots fibrous, culms obtusely 

 triangular, smooth, rather slender, 2>-4 tall. 

 Leaves 2 // -4 // wide, rough-margined, the upper 

 and those of the involucre not exceeding the in- 

 florescence; umbel decompound, the primary rays 

 very slender, sometimes 6' long, widely spreading 

 or drooping; raylets filiform; involucels setaceous; 

 spikelets mostly solitary at the ends of the raylets, 

 sessile or peduncled, linear-oblong, obtuse, 3 // -6 // 

 long, y z ' f thick; scales ovate, greenish-brown, sub- 

 acute or obtuse, with a prominent midvein and 

 scarious margins; bristles 6, flexuous, longer than 

 the achene, somewhat pubescent, not barbed, 

 shorter than the scales; stamens 3; style 3-cleft; 

 achene sharply 3-angled, oblong, narrowed at both 

 ends, apiculate, nearly white, not shining. 



In swamps, Kentucky to Missouri, south to Florida and Louisiana. The spikelets sometimes 

 partially develop into tufts of leaves. June-Aug. 



27. Scirpus lineatus Michx. Reddish Bulrush. (Fig. 635.) 



Scirpus lineatus Michx. Fl. Bor. Am. i : 32. 1803. 



Perennial by stout rootstocks, culms rather 

 slender, triangular, erect, i-3 high, leafy, the 

 upper leaves and those of the involucre not exceed- 

 ing the inflorescence. Leaves 2 // -4 // wide, light 

 green, flat, rough-margined; umbels terminal and 

 commonly also axillary, decompound, the rays 

 very slender, becoming pendulous ; spikelets mostly 

 solitary at the ends of the slender raylets, oblong, 

 obtuse, $"-5" long, about \" in diameter; scales 

 ovate or oblong, reddish-brown with a green mid- 

 vein, their tips slightly spreading; bristles 6, 

 weak, smooth, entangled, much longer than the 

 achene, equalling the scales or slightly protruded 

 beyond them at maturity; stamens 3; style 3-cleft; 

 achene oblong or oblong-obovoid, pale brown, nar- 

 rowed at both ends, 3-angled, short-beaked' 



In swamps and wet meadows, Ontario to Georgia, 

 west to Oregon and Texas. June-Sept. 



