394 



JUNCACEAE. 



Juncus megacephalus M. A. Curtis. Carolina Rush. (Fig. 953.) 



Juncus megacephalus M. A. Curtis, Bost. Journ. Xat. Hist. 



1:132. 1835. 

 funcus scirpoides var. echinatus Engelm. Trans. St. Louis 



Acad. 2: 468. 1868. 



Stems i-3 high, tufted from a branching root- 

 stock, stout, 2-3-leaved. Leaves with auricled sheaths, 

 the blades of the basal 8' long or less, those of the 

 stem with successively shorter blades, the uppermost 

 rarely io // in length; inflorescence 6' high or less, its 

 lowest leaf almost bladeless, the others scarious; pan- 

 icle of 1-40 heads; heads spherical, 4 // -6 // in diameter; 

 perianth iX // ~ I X // l n g> its parts subulate, the outer 

 longer than the inner; stamens 3, half to two-thirds 

 the length of the inner perianth-parts; anthers in- 

 cluded, shorter than the filaments; capsule subulate, 

 beaked, equalling the perianth, 3-sided, i-celled; seed 

 oblong, \"-]^ ff long, acute at either end, reticulate in 

 12-14 rows, the areolae smooth. 



Virginia ? North Carolina to Florida. 



36. Juncus brachycephalus (Engelm.) Buch. Small-headed Rush. (Fig. 954.) 



Juncus brachycephalus Buch. in Engler, Bot. Jahrb. 12: 



268. 1890. 

 funcus Canadensis var. brachycephalus Engelm. Trans. 



St. Louis Acad. 2: 474. 1868. 



Stems i-2j high, tufted from a branching root- 

 stock, erect or occasionally reclining and rooting at 

 the nodes, 2-4-leaved; leaves all with well developed 

 blades, the lower commonly 4 / -8 / long; inflorescence 

 commonly 2 / ^ / -6 / high, with spreading branches, its 

 lowest bract foliose; heads top-shaped, 2-5-flowered; 

 perianth \"-\W long, its parts green, or reddish 

 brown above, with hyaline margins, lanceolate, obtuse 

 or sometimes acute, the outer shorter than the inner; 

 stamens 3; anthers much shorter than the filaments; 

 capsule reddish brown, about one-half longer than the 

 perianth, ovoid-oblong, acute to obtuse, tipped, 3-sided, 

 i-celled; seed ~Y$"-W long, with narrowly oblong 

 body, short-tailed at either end, 20-30 ribbed, somewhat 

 cross-barred, the intervening spaces finely cross-lined. 



New York to Pennsylvania, Illinois and Wisconsin. 



Juncus Canadensis J. Gay. Canada Rush. 



J. Canadensis}. Gay; Laharpe, Monog. Jonc. 134. 1825. 

 Juncus Canadensis longicaudatus Engelm. Trans. St. 



Louis Acad. 2: 474. 1868. 



Stems i-4 high, erect, stout, 2-4-leaved, few in a 

 tuft, from a branched rootstock. Basal leaves usually 

 decayed at flowering-time; stem leaves with large loose 

 auriculate sheaths commonly 2 / -4 / long, and a stout 

 erect blade usually 4/-IO' long; panicle 3'-io' in 

 height, the branches moderately spreading; heads 

 usually crowded, top-shaped to hemispheric or sub- 

 spheric, 5-40- flowered; perianth i^"- 2 " l n g, tne 

 parts narrowly lanceolate, acute, the inner longer 

 than the outer; stamens 3, one-half to two-thirds as 

 long as the perianth, anthers much shorter than the 

 filaments; capsule lanceolate, acute, mucronate, 3- 

 sided, i-celled, reddish-brown, exceeding the perianth 

 by YI" or I GSS ; see d W to nearly i" long, tailed at 

 either end, the body with a smooth shining* coat, 

 about 4o-striate. 



New Brunswick to Minnesota, Georgia and Louisiana. 





37- 



(Fig. 955-) 



