56 JUNCACEAE. 



Juncus bufonius L. Annual, branching from the base, 5-30 cm. tall; leaf 

 blades flat or involute, slender; flowers loosely scattered, usually on but one 

 side of the long branches of the panicle; perianth segments pale, scarious- 

 margined, lanceolate, acuminate; stamens 6; capsule narrowly oblong, with a 

 short blunt beak; seeds very finely reticulate. Everywhere common. 



Juncus sphaerocarpus Nees. Very similar to J. bufonius in all respects 

 save the capsule which is globose. Probably common but rarely collected. 



Juncus dudleyi Wiegand. Densely tufted, stiffly erect, 30-50 cm. high; 

 leaves short, usually less than half as long as the stems; auricles yellowish; 

 panicle rather close, 2-7 cm. long; perianth segments spreading, pale, 4-5 mm. 

 long, slightly exceeding the 1-celled ovoid capsule. Common in low ground; 

 easily distinguished by the cartilaginous auricles. 



Juncus tenuis Willd. Densely tufted, 15-30 cm. tall; leaves flat or some- 

 what involute, narrow, shorter than the stems; auricles whitish, 1-1.5 mm. 

 long; panicle loose, seldom exceeded by the slender bract; perianth segments 

 lanceolate, pale, 3^4.5 mm. long; capsule ovoid, thin-walled, rounded at the apex, 

 1-celled with 3 parietal placentae; seeds minutely reticulate. Very common. 



Juncus brachyphyllus Wiegand. Stems tufted, stiff, erect, 30-50 cm. high; 

 leaves flat, 1.5-2 mm. broad, only one-fourth to one-third the length of the 

 culms; inflorescence many-flowered, short and rather crowded, usually ex- 

 ceeded by the bracts; perianth-segments subulate, acute; capsule oblong, the 

 triangular apex usually obtuse. Blue Mountains and Craig Mountains, Idaho. 



Juncus confusus Coville. Pale green, tufted, erect, the culms 40-50 cm. 

 high; leaves very narrow, flat or involute, one-half to two-thirds as long as 

 the culms; inflorescence dense, 5-20 mm. long, exceeded by the bracts; 

 perianth-segments lanceolate, acutish, 3.5-4 mm. long, the margins scarious; 

 capsule oblong, the triangular apex retuse. Spangle, Suksdorf. 



Juncus longistylis Torr. Stems 30-60 cm. high; leaves 15-30 cm. long; 

 bract shorter than the inflorescence; panicle consisting of 5-20 heads, these 

 few-flowered; perianth segments lanceolate, acute or acuminate, pale brown, 

 smooth; stamens 6; capsule oblong, 3-angled above, much shorter than the 

 segments. 



Juncus regelii Buch. Perennial, stoloniferous, pale green; stems smooth 

 or minutely scabrous, 12-50 cm. high, erect; leaves flat, 1.5-2 mm. broad; 

 heads solitary or sometimes 2 or 3, globose, many-flowered; outer perianth seg- 

 ments lanceolate, acute, inner ovate, obtuse, all rough, brown with pale 

 margins; stamens 6; capsule longer than the perianth; seeds linear, tailed at 

 each end. In springy places, rare. 



Juncus orthophyllus Coville. Perennial, with creeping rootstocks; stems 

 leafy, 30-70 cm. tall; leaves flat, 2-3 mm. broad, pale green, shorter than the 

 sheaths, without ligules; flowers aggregated into few-flowered heads, these 

 panicled; perianth segments straw-colored, lanceolate, acuminate, scarious- 

 margined, rough, 5 mm. long; stamens 6; capsule 3-angled, oblong, acute, 

 short-beaked. Common along streams. 



Juncus mertensianus Bong. Stems terete, weak, crowded, 10-30 cm. 

 high, from short creeping rootstocks; leaves 5-15 cm. long, about 2 mm. wide; 

 ligules scarious; heads solitary, globose, dark brown, about 1 cm. broad; 

 perianth segments lanceolate, acuminate, 3 mm. long, exceeding the obtuse 

 capsule. Moist meadows in the Blue Mountains at high altitudes. 



Juncus ensifolius Wiks. Rootstocks thick, creeping; stems leafy, 15-30 

 cm. high; heads few, globose, dark brown or nearly black; perianth segments 

 lanceolate, acuminate, 3 mm. long; stamens 3 (rarely 6); capsule 3-angled, 

 acute, barely exceeding the perianth. In wet places especially in the moun- 

 tains. 



