35° 



CYPERACEAE. 



Vol. I. 



Scleria setacea Poir. Torrey's Nut-rush. Fig. 862. 



S. setdcea Poir. in Lam. Encycl. 7: 4. 1806. 



Scleria Torreyana Walp. Ann. 3 : 696. 1852-53. 



Scleria laxa Torr. Ann. Lye. N. Y. 3: 376. 1836. Not. R. 



Br. 1810. 

 Scleria reticularis pubescens Britton, Ann. N. Y. Acad. Sci. 



3: 232. 1885. 



Culms weak but rather thick, spreading or diffuse, 

 3-angled, nearly or quite smooth, l°-2i° long. Leaves 

 linear, nearly flat, smooth, glabrous, li"-4" wide, not 

 exceeding the culm ; spikelets in a loose terminal cluster, 

 and 1-3 filiform-stalked smaller axillary ones; bracts 

 glabrous; achene globose, somewhat pointed, nearly 1" 

 in diameter, irregularly rugose with low ridges some- 

 times spirally arranged or reticulated, pubescent; hypo- 

 gynium 3-lobed, the lobes appressed to the base of the 

 achene. 



In moist soil, Connecticut ( ?) ; Long Island to Florida, 

 Indiana, Missouri, Texas and Mexico. Also in Cuba and 

 Porto Rico. June-Aug. 



5. Scleria pauciflora Muhl. Papillose Nut- 

 rush. Fig. 863. 



Scleria pauciflora Muhl. ; Willd. Sp. PI. 4 : 318. 1805. 



Rootstocks thick, hard, clustered; culms slen- 

 der, rather stiff, erect, usually tufted, glabrous or 

 sparingly pubescent, 3-angled, a/-2° tall. Leaves 

 very narrowly linear, erect, less than 1" wide, the 

 lower short, the upper elongated and often over- 

 topping the culm, their sheaths often densely pu- 

 berulent; spikelets in a small terminal cluster and 

 sometimes also in I or 2 axillary short-stalked 

 ones ; bracts ciliate or glabrous ; achene oblong or 

 globular, \" in diameter or rather more, crusta- 

 ceous, papillose, the lower papillae elongated and 

 reflexed; hypogynium a narrow obtusely triangu- 

 lar border supporting 6 small, distinct tubercles 

 somewhat approximate in pairs, sometimes with 

 3 additional smaller intermediate ones. 



In dry soil, New Hampshire to Ohio, Missouri, 

 Kansas, Florida and Texas. Consists of several races, 

 differing mainly in pubescence. June-Sept. 



6. Scleria ciliata Michx. Hairy Nut- 

 rush. Fig. 864. 



5". ciliata Michx. Fl. Bor. Am. 2 : 167. 1803. 



S. Elliottii Chapm. Fl. S. States, 531. i860. 



5 pauciflora Elliottii Wood, Bot. & Fl. 368. 1871. 



Rootstocks rather stout, clustered ; culms stout 

 to slender, 3 long or less, 3-angled, glabrous or 

 pubescent. Leaves ¥'-3" wide, glabrous or pu- 

 bescent ; spikelets in a terminal cluster and often 

 in 2 or 3 stalked lateral ones; bracts ciliate; 

 scales ciliate or glabrous; achene subglobose or 

 globose-ovoid, about ii" in diameter, roughened 

 by unequal papillae or short ridges; hypogynium 

 an obtusely 3-angled border supporting 3 entire, 

 2-notched or 2-lobed tubercles. 



Pine barrens and meadows, Virginia to Missouri, 

 Florida and Texas. Also in Cuba and Santo Do- 

 mingo. Consists of several races, differing in pu- 

 bescence and in the form of the tubercles. 



