480 



JUNCACEAE. 



VOL. I. 



40. Juncus scirpoides Lam. Scirpus-like Rush. 

 Fig. 1205. 



Juncus scirpoides Lam. Encycl. Meth. Bot. 3: 267. 1789. 



Stems 8'-3 high, erect, terete, in clusters from 

 short, horizontal rootstocks. Stem leaves 1-3 ; blades 

 terete, i" thick or less, usually less than 4' long, the 

 septa perfect; basal leaves similar, but with longer 

 blades ; inflorescence strict or slightly spreading, some- 

 times 6' in length; heads 2-30, either simple, globose, 

 3"-4" in diameter in flower, and 4"~5i" in fruit, or 

 lobed, and of slightly greater diameter; perianth li"- 

 i\" long, its parts subulate, the inner somewhat shorter; 

 stamens equalling the inner perianth-parts ; capsule sub- 

 ulate, i-celled, its long beak exceeding the perianth ; 

 seed oblong, abruptly apiculate at either end, $"-i" 

 long, reticulate in 14-20 longitudinal rows, the areolae 

 smooth. 



New York to Florida, Missouri and Texas. 



Juncus megacephalus M. A. Curtis, doubtfully admitted 

 into our first edition from Virginia, is not definitely known 

 to grow north of North Carolina. 



41. Juncus brachycephalus (Engelm.) Buch. Small-headed Rush. Fig. 1206. 



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



268. 1890. 

 Juncus^ canadensis var. brachycephalus Engelm. Trans. St. 



Louis Acad. 2: 474. 1868. 



Stems i-2i 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 f oliose ; heads top-shaped, 2-s-flowered ; 

 perianth i"-ii" 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 $"-$" long, with narrowly oblong body, 

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

 barred the intervening spaces finely cross-lined. 



Maine to Pennsylvania, Missouri and Wisconsin. 



42. Juncus canadensis J. Gay. Canada Rush. Fig. 1207. 



J. canadensis J. Gay; Laharpe, Monog. June. 134. 1825. 



Juncus canadensis longicaudatus Engelm. Trans. St. Louis 



Acad. 2 : 474. 1868. 



Juncus canadensis subcaudatus Engelm. loc. cit. 1868. 



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

 from a branched rootstock. Basal leaves usually de- 

 cayed 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 top-shaped 

 to hemispheric or subspheric, 5-4O-flowered ; perianth 

 ii"-2" long, the 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 \" or less ; seed \" to nearly i" long, tailed at either 

 end, the body with a smooth shining coat, about 

 4O-striate. 



Newfoundland to Minnesota, Georgia and Louisiana. 



