RUSH FAMILY 249 



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



capsule narrow, attenuate 28. J. oxymeris. 



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



Leaves 2 to 4 lines wide; 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. ensifolius. 



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

 ate, equaling the perianth 31. J. phaeocephalus. 



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

 or slightly compressed, 2 to 4 feet high, stout, rigid and pungent ; panicle com- 

 pound 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 !/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. Barrows; 

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

 7935; w. edge Colorado Desert, Parish 6149. Forma xantlwsus Jepson n. forma, capsule less 

 rounded, yellow. Thousand Palms Canon, nw. of Indio, Jepson 6041 (type) ; Chuckawalla 

 Sprs., Hall 5978. 



Kefs. JUNCUS ACUTUS L. var. SPHAEROCARPUS Engelm. Bot. Wheeler, 376 (1876), type 

 loc. Santa Barbara, Bothrock. J. robiistus 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, 2 1 /2 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 Mohave deserts. East to 

 Nevada. 



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

 Works), 6881 (Texas Spr.) ; Saratoga Sprs., Death Valley, Parish 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. 

 Brandegee. 



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

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

 Engler, Pflzr." 436; 152, fig. 77 (1906). 



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

 stout, erect, terete ; rootstock stoutish ; panicle lateral, lax or compact, many- 

 flowered ; flowers commonly somewhat secund ; perianth segments with green mid- 

 ribs and membranous mostly purplish 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, smoothish or faintly reticulate, */ 

 to i/o line long. 



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

 North to Alaska. 



Locs. Eureka, Tracy 1190% ; Lake Pilarcitos, San Mateo Co., Davy 758 ; Point Lobos, 

 San Francisco, Davy 4010; Monterey, Ferguson 277. Var. tracyi Jepson n. var. Inflorescence 

 densely capitate. Sand dunes, Eureka, Tracy (type). 



Eefs. JUNCUS LESEURII Bol. Proc. Cal. Acad. 2:179 (1863), type loc. San Francisco Bay 

 region, Bolander; Buch. in Engler, Pflzr. 436 : 147, fig. 75 (1906). J. balticus Willd. subsp. 

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

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

 form. Var. TRACYI Jepson. 



