RUSH FAMILY. 



Juncus Canadensis subcaudatus Kngelm. Tran. St. IxwU Acad. a r 



Stuns 15' -30' high, slender, frequently weak and rrctininB 

 f short tails. Rhode Island to Pennsylvania and ( .. 



very short 



Juncus Canadensis brevicaudatus Kngelm. Trann. St. LoU Acad. *: 4* itto. 



fuiicns Canadrnsis var. coarclattis Kngelm. Trans. St. Ix>uu Acad. J- 474. iMg. 



Stems erect, 8' -30' tall, slender, closely tufted; panicle contracted hr> 

 |"-f" in length, long-tailed. Nova Scotia to Minnesota and New J. 



vfcfc 



38. Juncus acuminatus Michx. Sharp-fruited Ru*h. (Fig. ,; 



ncus acuminatus Michx. Fl. Bor. Am. i- 102 

 1803. 

 Plant io'-$ high; rootstock short and incon- 

 spicuous. Stems few or several in a tuft, erect, 

 i-3-leaved; blades of the lower leaves 4'-8 / long, 

 #"-i" thick, the upper shorter; inflorescence 

 /-6' high, and with 5-50 heads, rarely larger, 

 reduced even to a single head, its branches 

 iually spreading; heads top-shaped, hemi- 

 iheric or subspheric, 3-2o-flowered ; perianth 

 . "-iK" long, its parts lanceolate-subulate 

 :arly equal; stamens 3, about one-half as long 

 the perianth; anthers shorter than the fila- 

 ents; capsule ovate-lanceolate, broadly acute, 

 ucronate, i-celled, equalling the perianth, 

 ;ht brown at maturity, the valves separating 

 rough the apex; seed oblong, about %" in 

 mgth, tipped at either end, reticulate in 16-20 

 mgitudinal rows, the areolae transversely 

 lany-lined. 



Maine to southern Ontario and Minnesota, south 

 Georgia and Mexico. Also on the north 

 st. Heads often proliferous. 



Juncus acuminatus debilis (A. Gray) Kngelm. T: it U Acad. X: 463. 



Juncus debilis A. Gray, Man. 506. 1848. 



Smaller, densely tufted, io'-2o' high, the stems often weak and j- **li *bo 



i"-iK" long; capsule linear-oblong, obtuse, about one third longer than the prria- 

 New Jersey to South Carolina. 



39. Juncus robustus (Engelm.) Coville. Stout Ru>h. '.Fig. 957.) 



. X. robmtlmt 



St. I.'ui." Aia-1 2 I". l8<8. 



Plant about 3 hix Stem* *' or few ta 

 a tuft, stout, nearly terete, common 

 thick below, i-a-leax^d; blade* erict. tmte. ooo 

 spicuously many-epute, V-l* Ion. 

 thick, usually reaching or exceeding the iAoft- 

 cence; inflorescence 4'- 10' high, with moderately 

 spreading branche* and innumerable ( 

 monly 300-500) head. the bUde of to \a*9* loal 

 sometimes half as long as the iaflofCKCMt; brad* 

 2-io-flowered; perianth j ' i U " to". H p 

 nearly equal, lanceolate-anbolate; ataaini J.OBI 

 half to two-thirds a long a th ptfwlh; eapoiilo 

 equalling or one third exceeding Ibe pemanh, 

 straw-colored at maturitr. narrowly to hroadl 

 oblong, obtuse with a short tip. j^tdcd! b 

 dry, i -celled, the vale separate sad i 

 after dehiscence; seed nearly aa in / 



Southern IHinoi* to xmUnaatem Kama*. OkU- 

 hom:i in< ' Trxa*. 



