362 



JUNCACEAE 



30. Juncus supiniformis Engelm. 

 Hair-leaved Rush. Fig". 884. 



Jttncus supiniformis Engelm. Trans. St. Louis Acad. 2: 461. 1868. 



Stems tufted, the rhizomes much-branched and matted, 

 clothed with numerous fibrous roots. Early leaves elon- 

 gated and capillary, floating ; stem-leaves terete, much longer 

 than the stems, about 1 mm. in diameter, not conspicuously 

 septate ; inflorescence a simple panicle of 2-6. 3-9-flowered 

 heads; perianth light brown, 4 mm. long; segments nar- 

 rowly lanceolate, acute, 3^-nerved ; stamens 3 ; anthers 

 shorter than the filaments ; capsule narrowly oblong, about 

 a third longer than the perianth, light brown, acute at the 

 summit and rather stoutly beaked, the beak about 0.5 mm. 

 long ; seeds obovate, apiculate at each end. 



In swamps. Humid Transition Zone; near the coast from Hum- 

 boldt to Mendocino Counties, California. Type locality: nc-ar Mendo- 

 cino City, California. 



31. Juncus oreganus S. ^^"ats. 

 Oregon Rush. Fig. 885. 



Juncus oreganus S. Wats. Proc. Am. Acad. 23: 267. 18S8. 

 Juncus paucicapitatus Buch. Engler, Bot. Jahrb. 12: 367. 

 1890. 



Stems numerous, tufted, from slender matted root- 

 stocks, 10-20 cm. high, very slender. Basal leaves 

 early deciduous ; stem leaves 2-4, the sheaths with 

 conspicuous hyaline margins and auricles, the blades 

 25-60 cm. long, terete, conspicuously septate, panicle 

 of usually 2-4 small few-flowered heads ; perianth- 

 segments nearly equal, narrowly lanceolate, acute, 

 brown; stamens half as long as the perianth; anthers 

 much shorter than the filaments ; capsule linear- 

 oblong, often twice as long as the perianth, acute and 

 mucronate, dark brown ; seeds with about 20 ribs, the 

 areolae cross-lined. 



In bogs near the coast, Hvnnid Transition Zone; Ilwaco, 

 Seattle, Sproat Lake, \'ancouver Island. Type locality: 

 Ilwaco, Washington. 



32. Juncus articulatus L. 



Jointed Rush. Fig. 886. 



Juncus articulatus L. Sp. PI. 327. 1753. 



Stems erect or spreading, 2-6 dm. high, tufted, from 

 branching rootstocks. Basal blade-bearing leaves only 

 1 or 2, usually dying early, stem leaves with rather 

 loose sheaths and conspicuously septate terete blades; 

 inflorescence 5-10 cm. high, its branches divaricately 

 spreading; heads hemispheric to top-shaped, 6-12-flow- 

 ered ; perianth 2-3 mm. long, the segments nearly equal, 

 lanceolate acuminate, reddish brown with a green mid- 

 rib, or green throughout ; stamens 6, one-half to three- 

 fourths as long as the periantii ; anthers shorter than 

 the filaments ; capsule longer than the perianth, dark 

 brown, 3-angled, sharply acute, tapering to a conspicu- 

 ous tip, 1-celled ; seeds oblong-obovoid, about 0.5 mm. 

 long, reticulate in about 16-20 rows, the areolae finely 

 cross-lined. 



Moist ground about springs and marshes, Canadian and 

 Humid Transition Zones; British Columbia to Clatsop County, 

 Oregon, and Labrador to New York, and Michigan; also m 

 Europe and Asia. Type locality : Europe. 



