RUSH FAMILY 



361 



27. Juncus triformis Engelm. 

 Yosemite Dwarf Rush 



Fig. 881. 



Jiinctis triformis Engelm. Trans St. Louis Acad. 2: 492. 1868. 

 Juncus triformis stytosus Engelm. Trans. St. Louis Acad. 2: 492. 

 1868. 



Annual with very short stems from fibrous roots. Leaves 

 25 mm. long or less, filiform, channelled ; peduncles several, 

 scape-like, 5-10 cm. long; flowers usually 3-7, rarely solitary 

 in a small terminal head; perianth 2-3 mm. long, brownish ; 

 segments narrowdy lanceolate, acuminate, nearly equal ; 

 stamens 3. about three-fourths the length of the perianth ; 

 anthers slightly longer than the filaments ; capsule nearly 

 equalling the perianth, ovate, obtuse, apiculate ; style 2-3 

 mm. long; seeds ovate, obtuse, faintly few-ribbed, the 

 areolae cross-lined. 



Moist places, Transition Zone; Sierra Nevada and San 

 Bernardino Mountains, California. Type locality: Yosemite Valley, 

 California. 



28. Juncus brachystylus (Engelm.) Piper. 



Short-styled Dwarf Rush. Fig. 882. 



Juncus triformis braclivstvius Engelm. Trans. St. Louis 



Acad. 2: 492. 1868." 

 Juncus braclivstvius Piper, Contr. Nat. Herb. 11: 181. 



1906. 



Annual, witli very short stems, from fibrous 

 roots. Leaves 1-2.5 cm. long, filiform, chan- 

 nelled; peduncles several, scape-like. 5-8 cm. 

 long ; flowers 3-7. rarely solitary, in a terminal 

 head; stamens 3; anthers minute, much shorter 

 than the filaments ; styles very short, about 0.5 

 mm. long. 



Moist places, Transition and Upper Sonoran Zones: 

 Washington to Mendocino County, California. Type 

 localitv: Ukiah, California. 



29. Juncus uncialis Greene. 

 Inch-high Dwarf Rush. Fig. 883. 



Juncus uncialis Greene, Pittonia 2: 105. 1890. 



Annual with very short stems, from fibrous roots. 

 Leaves 3-8 mm. long, filiform, flat and somewhat 

 fleshy ; peduncles several, 2-3 mm. long ; flowers 

 solitary, terminal, subtended by a single bract; peri- 

 anth hj^aline, with purple or greenish midrib, 1.5 

 mm. long, the segments oblong-lanceolate, acute ; 

 stamens 3 ; capsule a little shorter than the perianth, 

 ovoid, obtuse ; seed ovate, apiculate, few-ribbed, the 

 areolae cross-lined. 



Moist places, Upper Sonoran and Transition Zones; Wash- 

 ington, south to Utah and central California. Type locality: 

 Suisun marshes, Solano County, California. 



