388 JUNCACEAE. 
17. Juncus marginatus Rostk. Grass-leaved Rush. (Fig. 935.) 
Juncus marginatus Rostk. Monog. June. 38. pl. 2. /. 3. 1801. 
Juncus marginatus var. paucicapitatus Engelm. Trans. 
St. Louis Acad. 2: 455. 1866. 
Stems erect, tufted, 6’-30’ high from branching 
rootstocks, somewhat bulbous at the base, compressed, 
2-4-leaved. Leaf-sheaths.auriculate; blades %4//-114/’ 
broad, 2-4 conspicuous veins in addition to the mid- 
rib; inflorescence 4’ high or less, the panicle com- 
posed of 2-20 turbinate to subspherical 5-10-flowered 
heads; perianth 1 4’/-13¢// long, the outer parts ovate, 
acute, the inner slightly longer, obovate, obtuse, with 
hyaline margins; stamens 3, nearly as long as the peri- 
anth; anthers ovate, reddish brown when dry, much 
shorter than the filaments; capsule equalling the peri- 
anth, obovoid, truncate or retuse, almost 3-celled, the 
placentae deeply intruded; seed oblong, }/’-\%’’ long, 
pointed at either end, 12-16-ribbed. 
Grassy places, Maine to Ontario, Florida and Nebraska. 
Juncus marginatus aristulatus (Michx.) Coville, Proc. Biol. Soc. Wash. 8:123. 1893. 
Juncus aristulatus Michx. Fl. Bor. Am. I: 192. 1803. 
Juncus marginatus var. biflorus Wood, Classbook, Ed. 2, 725. _1861.. 
Taller, sometimes 3'2° high; leaf-blades 1''-2!2'' broad; heads usually 20-100, mostly 2-5-flow- 
ered. New York to Florida and Mexico, mostly near the coast; Mississippi Valley to Michigan. 
uncus marginatus setosus Coville, Proc. Biol. Soc. Wash. 8: 124. 1893. 
Inner perianth-parts ovate or lanceolate, acute or acuminate; seeds smaller. Kansas to Mexico. 
18. Juncus longistylis Torr. Long-styled 
Rush. (Fig. 936.) 
Juncus longistylis Torr. Bot. Mex. Bound, 223. 1859. 
Stems erect, loosely tufted, 8’-30’ high, rather stiff, 
slender, compressed, 1-3-leaved, the leaves mostly below 
the middle. Leaf blades 3¢’/-114’’ 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 214’’-3’’ long, the parts 
equal, brown, lanceolate, acuminate, with hyaline mar- 
gins; stamens 6, half to two-thirds as long as the peri- 
anth, the yellow linear anthers longer than the filaments; 
style about %’” long; stigmas 1//-114’’ long; capsule 
shorter than the perianth, oblong, brown, angled above, 
obtuse or depressed at the summit, mucronate, 3-celled; 
seed oblong, white-tipped, about ¢’’ long, 14~20-ribbed. 
Western Nebraska and the Rocky Mountain region. = MM 
1g. Juncus répens Michx. Creeping Rush. (Fig. 937.) 
Juncus repens Michx. Fl. Bor. Am. I: 191. 1803. 
Perennial by prostrate rooting branches; stems tufted, 
compressed, ascending, floating or prostrate, 2’-20’ long. 
Leaves with compressed sheaths 10’ in length, auricu- 
late, the blades 1/314’ long, 1%4’/-1’’ broad, filiform-acu- 
minate; inflorescence of 1-S heads, one or more heads 
often eccurring also at the lower nodes; heads 5~10- 
flowered; flowers 3//-5’’ long, the outermost slightly 
recurved; periauth-parts subulate-lauceolate, 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, 4//-1// 
long, finely reticulate in 25-40 longitudinal rows. 
In swamps and streams, Delaware to Florida, Cuba and 
Texas, and in Lower California. 
