JUNCACEAE. 



VOL. I. 



22. Juncus setosus (Coville) Small. 

 Awn-petaled Rush. Fig. 1187. 



/. marginatus setosus Coville, Proc. Biol. Soc. 



Wash. 8 : 124. 1893. 

 Juncus setosus Small, Fl. SE. U. S. 258. 1903. 



Plants rather loosely tufted, i-2i high, 

 bright green. Stems not much thickened at 

 the base ; leaves with auriculate sheaths, some- 

 times quite numerous; blades i"-2-J" wide, 

 similar to those of /. marginatus; panicle i'~4' 

 high, composed of 20-100 heads, or smaller in 

 depauperate forms; perianth ii"-2" long, the 

 outer parts lanceolate-acuminate, the inner 

 slightly larger than the outer, lanceolate to 

 ovate-lanceolate, setiform-acuminate; stamens 

 3, much shorter than the perianth; anthers and 

 filaments about equal in length, the former 

 reddish-brown ; capsules oblong, about as long 

 as the perianth, blunt. 



In woods and wet places, Nebraska to Louisiana, 

 Arizona and Mexico. 



23. Juncus longistylis Torr. Long-styled Rush. Fig. 1188. 



Juncus longistylis Torr. Bot. Mex. Bound. 223. 1859. 



Stems' erect, Iposely tufted, 8'-3o' high, rather stiff, 

 slender, compressed, i-3-leaved. Leaf-blades l"-ii" wide, 

 acute, striate, the midrib well defined; inflorescence 2' 

 high or less, usually of 2-10 irregular 3-8-flowered heads, 

 or reduced to a single larger one; perianth 2z"-3" long, 

 the parts equal, brown, lanceolate, acuminate, with hyaline 

 margins ; stamens 6, half to two-thirds as long as the peri- 

 anth, the yellow linear anthers longer than the filaments ; 

 style about i" long; stigmas i"-ii" long; capsule oblong, 

 brown, angled above, obtuse or depressed at the summit, 

 mucronate, 3-celled; seed oblong, white-tipped, about i" 

 long, i4-2o-ribbed. 



Newfoundland ; western Ontario to Nebraska, British Co- 

 lumbia and New Mexico. 



24. Juncus repens Michx. Creeping Rush. Fig. 1189. 



Juncus repens Michx. Fl. Bor. Am. i : 191. 1803. 



Perennial by prostrate rooting branches ; stems tufted, 

 compressed, ascending, floating or prostrate, 2'-2o' long. 

 Leaves with compressed sheaths 10" in length, auricu- 

 late, the blades i'-3$' long, i"-i" broad, filiform-acumi- 

 nate ; inflorescence of 1-8 heads, one or more heads 

 often occurring also at the lower nodes; heads 5-10- 

 flowered; flowers 3"-s" long, the outermost slightly 

 recurved ; perianth-parts subulate-lanceolate, the outer 

 keeled, about one-third shorter than the inner; stamens 

 3, half to one-third the length of the perianth; filaments 

 longer than the yellow anthers ; capsule subulate, beak- 

 less, about as long as the outer perianth-parts, 3-celled, 

 the valves membranous, breaking away from the axis in 

 dehiscence; seed oblong, acute at either end, |"-i" long, 

 finely reticulate in 25-40 longitudinal rows. 



In swamps and streams, Delaware to Florida, Cuba and 

 Texas, and in Lower California. 



