360 



JUXXACEAE 



24. Juncus obtusatus Engelm. 

 Blunt-scaled Rush. Fig. 878. 



Juitcus obtusatus Engelm. Trans. St. Louis Acad. 2: 495. 1868. 



Stems tufted, 10-25 cm. high, from creeping rootstocks. 

 Basal leaves grass-like, the junction of the sheath and the 

 blade inconspicuous, without auricles, usually about equalling 

 the stems, 2-3 mm. wide ; stem leaves 1, rarely 2, sometimes 

 none ; heads paniculate, mostly 4—8, sometimes reduced to 1 

 or 2, commonh* 3-5-flow^ered ; perianth 2-3 mm. long, pale 

 brown, the roughened portion narrow and obscure : segments 

 ovate, obtuse, about equal ; capsule longer than the perianth, 

 oblong-ovoid, depressed at the obtuse apex and mucronate, 

 dark brown ; seeds minutely reticulate. 



Moist places along mountain streams. Transition Zone: central 

 Sierra Nevada to the San Bernardino Mountains, California. Type 

 locality : near the Mariposa Grove, California. 



25. Juncus longistylis Torr. 

 Long-styled Rush. Fig. 879. 



Juncus longistylis Torr. Bot. Mex. Bound. 223. 1859. 



Stems erect, loosely tufted, 2-4 dm. high, rather stiff, 

 slender, compressed. Basal leaves flat, grass-like, one- 

 third to one-half the length of the stem ; sheaths scarious- 

 margined and with a well-developed auricle ; blades 

 1.5-4 mm. wide, acute, striate; stem leaves 1-3, their 

 blades commonly 5-7 cm. long ; heads usually 2-8, 3-8- 

 flowered, or reduced to a single larger one ; perianth 

 5-6 mm. long, the segments lanceolate, accuminate, green- 

 ish-brown with hyaline margins ; stamens 6, one-half to 

 two-thirds as long as the perianth ; anthers longer than 

 the filaments; style 1 mm. long; capsule oblong, brown. 

 angled above, obtuse or depressed at summit, mucronate, 

 3-celled ; seeds oblong, white-tipped, 0.5 mm. long, 14-20- 

 ribbed. 



Moist meadows, Canadian and Transition Zones; British 

 Columbia to western Ontario and Nebraska, south to Sierra 

 Nevada, California, and New Mexico. Also in Newfoundland. 

 Type locality : near the Copper Mines, New Mexico. 



26. Juncus macrophyllus Coville. 



Long-leaved Rush. 



Fio-. 880. 



1882, not 



Juncus canaliculatus Engelm. Bot. Gaz. 7: 6. 



Liebm. 1850. 

 Juncus macrophxlhis Coville. Univ. Calif. Pub. Bot. 1: 65. 



1902. 



Stems erect, 3-9 dm. high, rather stiff, compressed. 

 Basal leaves equalling or about half the ■ length of 

 the stems ; sheath scarious-margined and more or 

 less distinctly auriculate ; blades flat but rather thick 

 and firm, 1.5—4 mm. wide, striate, long attenuate and 

 pungent; stem leaves 1-3, their blades mostly 8-15 

 cm. long; inflorescense loosely paniculate; heads 

 usually 12-25, 3-5-flowered ; perianth green tinged 

 with fight brown, 5-6 mm. long, the segments ovate, 

 acute or obtuse, hyaline-margined, the outer dis- 

 tinctly shorter than the inner ; stamens 6. half the 

 length of the segments ; anthers reddish-brown, much 

 longer than the filaments ; capsule shorter than the 

 perianth, tapering at the apex into a short beak ; 

 seeds 0.5 mm. long, obliquely obovate. about 20- 

 ribbed, the reticulations lineolate. 



Dry hillsides and marshes. Transition and Upper Sonoran Zones; southern Sierra Nevada, California, to 

 northern Lower California and Arizona. Type locality: Mill Creek, San Bernardino Mountains, California. 



