368 



JUNCACEAE 



48. Juncus xiphioides Meyer. 



Iris-leaved Rush. Fig. 902. 



Jnncus xiphioides Meyer, Syn. June. 50. 1822. 

 Juncus xiphioides littoralis Engelm. Trans. St. Louis 



Acad. 2: 481. 1868. 

 Juncus xiphioides auratus Engelm. Trans. St. Louis 



Acad. 2: 481. 1868. 



Stems 6-8 dm. high, compressed and acutely 

 2-edged, from a thick creeping rootstock. 

 Leaves flattened laterally and equitant, the 

 sheaths without auricles, the hlades 10-40 cm. 

 long or the upper shorter, 3-10 mm. wide ; 

 heads numerous in a compound panicle. 3-20- 

 flowered ; perianth brownish, 3 mm. long, the 

 segments lanceolate, acuminate; stamens 6, half 

 as long as the perianth ; anthers shorter than 

 or sometimes nearly equalling the filaments ; 

 capsule oblong, acute below the mucronation, 

 slightly longer than the perianth ; seeds ovate- 

 lanceolate, reticulate, the areolae cross-lined. 



Wet places, Transition and Upper Sonoran Zones; 

 footliills of the northern Sierra Nevada and Coast 

 Ranges of California to northern Lower California 

 and Arizona. Type locality : Monterey, California. 



49. Juncus saximontanus A. Nels. 

 Rocky Aiountain Rush. Fig. 903. 



Juncus ensifolius major Hook, Fl. Bor. Am. 2: 191. 



1840. 

 Ju)icus xiphioides montanus Engelm. Trans. St. Louis 



Acad. 2: 481. 1868. 

 Juncus saxinwntanus A. Nels. Bull. Torrev Club 29: 



401. 1902. 



Stems 3-5 dm. high, compressed and 

 2-edged, from stout creeping rootstocks. 

 Leaves flattened laterally and equitant, usually 

 auricled, the blades 2-4 mm. wide ; heads pan- 

 icled, commonly 2-12, 3-10-flowered ; perianth 

 dark brown, 2.5-3 mm. long, the outer segments 

 lanceolate, acuminate, the inner acute, shorter 

 than the outer ; stamens b, about two-thirds 

 the length of the perianth ; anthers shorter 

 than the filaments ; capsule oblong, equalling 

 the perianth, obtuse below the mucronation, 

 dark brown ; seeds reticulate, the reticulations 

 in about 20 longitudinal rows, the areolae 

 cross-lined. 



Wet places. Transition and Canadian Zones: 

 British Columbia to Oregon, east to Alberta and New 

 Mexico. Type locality : Rocky Mountains. 



50. Juncus ensifolius Wiks. 

 Three-stamened Rush. 



274. 

 Louis 



Fig. 904. 



Juncus ensifolius Wiks. Kongl. Vet. Akad. Handl. 2: 



1823. 

 Juncus xiphioides triandrus Engelm. Trans. St. 



Acad. 2: 482. 1868. 



Stems compressed and 2-edged, 2)-6 dm. high, 

 arising from creeping rootstocks. Leaves flattened 

 laterally and equitant, auricles wanting, blades 7-15 

 cm. long, 2-5 mm. wide ; panicle of 2-7 rather 

 large many-flowered heads, or compound, with 

 numerous small heads, often only 3-6-flowered ; 

 perianth 3 mm. long, brown or dark brown, the 

 segments equal, narrowly lanceolate, acuminate ; 

 stamens 3. about two-thirds the length of the per- 

 ianth ; anthers shorter than the filaments ; capsule 

 oblong, slightly exceeding the perianth, obtuse be- 

 low the mucronation, dark brown ; seeds reticulate, 

 the reticulations in about 20 rows, areolae cross- 

 lined. 



Wet places. Transition and Canadian Zones; Alaska to 

 the Sierra Nevada and northern Coast Ranges, California, 

 east to Alberta and L^tah. Type locality: Unalaska. 



