RUSH FAMILY 249 



Heads small, imnierons, in large compound panicles; perianth segments linear-lanceolate; 



capsule narrow, attenuate 28. 3. oxymeris. 



Heads larger, usually few; perianth segments lanceolate; capsule oblong, acute. 



Leaves 2 to 4 lines vnde ; perianth segments light reddish brown ; capsule abruptly 

 acuminate, shorter than the perianth. 



Stamens 6 ; valleys and lower altitudes 29. J. xiphioides. 



Stamens 3 ; higher mountains or near the coast northward 30. J. ensif alius. 



Leaves % to 1% (or 2) lines wide; perianth segments very dark; capsule long acumin- 

 ate, equaling the perianth 31. J. phaeocepluilus. 



^. J. acutus L. var- sphaerocarpus Engelm. (Fig. 38a, b.) Stems terete 

 or slightly compres.sed, 2 to 4 feet higli, stout, rigid and pungent; panicle com- 

 pountl with unequal branches, usually 3 to 6 inches long, erect and strict, usually 

 exceeding the involucral bract; secondary bracts long acuminate, equaling or 

 exceeding the flowers; clusters 2 to 4-flowered ; perianth segments scarious- 

 margined very broadly at apex, especially the inner, 1 line long, exceeding the 

 stamens, the outer broadly lanceolate, acute, the inner obovate and deeply emarg- 

 inate ; capsule subglobose, narrower at base, rounded at summit, apiculate, brown, 

 nearly 2 lines long; seeds acute at each end or slightly caudate, about 1,2 line 

 long, very finely ribbed. 



Along the coast from San Francisco to San Diego, thence east into the Colo- 

 rado Desert and south into Lower California. 



Locs. — Jamul Valley, San Diego Co., Palmer 380; Coahuilla Valley region. D. P. Barnnvs; 

 Santa Catalina Isl., T. Brandegee; Oceanside, Parish 4400; Oxnard, Davy 7836; Indio, Davy 

 793.5; w. edge Colorado Desert, Parish 6149. Forma xaiithrisiis Jepsou n. forma, capsule less 

 rounded, vellow. — Thousand Palms Caiion, nw. of Indio, Jcpson 6041 (tj-pe) ; Chuekawalla 

 Sprs., Hah 5978. 



Eefs. — JUNCUS ACUTUS L. var. sph.\erocarpus Engelm. Bot. Wheeler, 376 (1876), type 

 loc. Santa Barbara, Bothroclc. J. robustus Wats. Proc. Am. Acad. 14:302 (1879). 



2. J. cooperi Engelm. (Fig. 38c.) Similar in habit to J. acutus but the 

 flowers larger, the perianth segments lanceolate, the outer acute, the inner mucro- 

 nate, 21,4 to 3 lines long ; capsule ovate, acute, slightly longer than the perianth, 

 greenish ; seeds larger, with broad white appendages at each end, or slightly 

 margined on one side. 



Salt marshes and alkaline flats, Colorado and llohave deserts. East to 

 Nevada. 



Locs. — Salt Creek, Death Valley, Grinnell ; Death Valley, Jcpson 6943 (Eagle Borax 

 Works), 6881 (Texas Spr.); Saratoga Sprs., Death Valley, "Parii'/i 10025; Panamint Lake, 

 Inyo Co., Parish 10154; Soda Lake, e. Mohave Desert, Parish 9874; travertine terraces, 

 Salton Sea, Parish 8428; Dos Palmas, Colorado Desert, Parish 8382; Carrizo Creek, T. 

 Brandcgee. 



Eefs. — JuNCUS COOPERI Engelm. Trans. Acad. St. Louis 2:590 (1868), type loc. region 

 of Camp Cadv, e. Mohave Desert, Cooper; Coville, Bull. Torr. Club 19:309 (1892); Buch. in 

 Engler, Pflzr." 430:152, fig. 77 (1906). 



3. J. leseurii Boland. Salt Rush. (Fig. 38d, e.) Stems 1 to 3 feet high, 

 stout, erect, ter<'te ; rootstoek stoutish ; ])aniele lateral, lax or compact, many- 

 flowered ; flowei-s conunonly somewhat seeund ; perianth segments with green raid- 

 ribs and membranous mo.stly purpli.sh brown margins, 2 to 3 lines long, outer 

 segments lanceolate-acuminate, the inner ones a little shorter and sometimes less 

 pointed; capsule oblong or ovoid, mucronate, triangular, shorter than the peri- 

 anth ; seeds ovoid, obtuse, scarcely apiculate, smoothi.sh or faintly reticulate, Vs 

 to I'o line long. 



Salt-marshes or near sand dunes or beaches, Monterey Co. to Humboldt Co. 

 North to Alaska. 



Locs. — Eureka, Tracy 119014; Lake Pilarcitos, San Mateo Co., Bavy 758; Poiut Lobos, 

 San Francisco, Dax-y 40i0; Monterey, Ferguson 277. Var. tracyi Jepson n. var. Inflorescence 

 densely capitate. — Sand dunes, Eureka, Trac^i (type). 



Rcfg — JuNCUS i.ESEURU Bol. Proc. Cal. Acad. 2:179 (1863), type loc. San Francisco Bay 

 region, Bolander; Buch. in Engler, Pflzr. 4-^';:147, fig. 75 (1906)". J. baltif^m Willd. subsp. 

 pacificus Engelm. Trans. St. Louis Acad. 2:448 (1866), 490 (1868). J. brewcri Engelm. 

 Trans. St. Louis Acad. 2:440 (1866), type loc. Monterey, Brewer 651, is merely a very slender 

 form. Var. tkacyi Jepson. 



