RUSH FAMILY. 



20. Juncus castaneus Smith. Chestnut Rush 



(Fig- 938.) 



f miens castaneus Smith, Fl. Brit. 1:383. 1800. 



Stems erect, 4 / -2o / high, terete, leafless, or with a 

 single leaf, arising singly from a slender rootstock. 

 Basal leaves 3-5, the outer sheaths short, loose, the 

 inner clasping, sometimes 4' long, not auriculate, 

 their blades tapering from an involute-tubular base to 

 a slender channeled acutish apex; inflorescence strict, 

 usually exceeded by its lowest bract, the other bracts 



lembranous and mostly equalling the flowers; heads 

 1-3, 3-i2-flo\vered; pedicels l A"-\yi' f long; perianth 

 brown or black, 2 // ~3^ // long, its parts lanceolate, 

 acute; stamens nearly as long as the perianth; anthers 

 about ]h rr long; capsule brown, paler toward the base, 

 -2 times as long as the perianth, narrowly oblong, 



ipering to an acute summit, imperfectly 3-cclIed; 



eed T.%"-!" long, contracted into long slender tails, 

 the body about %" long. 



Newfoundland to Alaska, south along the Rocky Mountain* to Colorado. la 



21. Juncus stygius L. Mt*>r Rush. (Fig. 939.) 



I.. S>>t . N.v. 



Clustend Alpine Rub. 



tyja 

 /. stygius var. Ameritmmiu Bach, in Bafter. Bat. JsArb. n 



393- 1890- 



Rootstock none; stems 3'-! high, single, or fa* 

 together, erect, i-3-leaved below, Itaflaai abovr. k*f- 

 sheaths 5"-io" long, clasping, oenrcd. rlmlalr. 

 blades erect or nearly so, lo"-4' long, slightly coal- 

 pressed, channeled on the upper tide, uprring to a 

 blunt point; inflorescence of 1-4 heads; beads t-4-flow- 

 ered; lowest bract usually exceeding the flowers; pari> 

 anth i / 2 "-2 % " long, pale, its parts lanceolate^ lod, 

 equal, with membranous margins, obtoat or acvUr; 

 stamens half as long as the perianth or more: anthers 

 oblong, shorter than the filaments; capsolc 

 long, pale brown, spindle-shaped, acute, mocrooat*. 

 3-celled below, few-seeded; seed spindle-shape* ! 

 \y 2 " long, with a loose coat, the body abort X" loog. 

 narrowed into thick tails. 



22. Juncus biglumis L. 



Juncus biglumis L. Sp. PI. 328. 1753. 



Stems i / -8 / high, loosely tufted on a branched root- 

 stock, erect, nearly terete. Leaves 1-5, all basal, the 

 outermost sheath usually 4" long or less, the* inner- 

 most sometimes much longer, inconspicuously or not 

 at all auriculate, the blades nearly terete; inflores- 

 cence a capitate cluster of 1-4 flowers, its lowest 

 bract erect, foliose, green with brown membranous 

 margins below; perianth ^"-i^'long, dark brown, 

 its parts membranous, oblong, obtuse, nearly equal; 

 stamens equalling the perianth; anthers linear-oblong; 

 capsule longer than the perianth, cylindric-oblong, 

 3-sided, retuse at the summit, with 3 keeled 

 shoulders, purplish black, or with purple-mar- 

 gined valves, imperfectly 3-celled; seed #"- 

 fusiform, the body narrowed into short stout tails. 



Baffin Bay to Alaska and British Columbia. Also in 

 Europe and Asia. 



Newfoundland to Maine, norther 

 and Minnesota; also in 



Two-flowered Rush. (Fig. 94*) 



