RUSH FAMILY. 93 



1. JUNCUS L. Eoth. 

 Plants of swamps or wet places; herbage glabrous. Stems usually 

 ■with spongy pith. Leaves stiff, terete, channeled or flat. Flowers 

 panicled, corymbose or in dense clusters, greenish or brownish. 

 Capsule 3-celled with central placentae or 1-cclled with 3 parietal 

 placentae, many-seeded. For detecting the marl^ings on the seeds of 

 most of the Junci, a f or J in. objective is necessary. (Classic name 

 for the rush, perhaps from Latin jungo, to join, the stems used for 

 binding.) 



Annuals; roots fibrous. 

 Leaves cauline; stems branched; flowers cymosely arranged in twos or tbrees 



and secund; testa finely striate and cross-lined \. J.bufwdvs. 



Leaves radical; stems scapiform; flowers solitary, terminal; testa reticulate. 



2. J. uncwMs. 

 Perennials; rhizomes mostly stout and creeping. 

 Lenves terete or wanting; panicle lateral, sessile. 

 Stamens 6. 

 Perianth 2^ to 3 lines long; anthers 1 line long; capsule oblong-ovate, 



acute 3. X Leseurii, 



Perianth 13o lines long; anthers J^ line long; capsule sub-globose, slightly 

 angled, 'obtuse, apiculate ... . . 4. J. patens. 



Stamens 3. 

 Perianth I line long; anthers % line long; capsule clavate-obovate, obtuse 



or retuse . . 5. X effusus. 



Leaves flat, channeled: panicle terminal. 



Stems terete; leaves not equitant nor transversely ribbed. 

 Rootsiocks tufted; stems nnked above, lealy at base; leaves less than % 

 line wide; flowers solitary in a difi'use or rarely compact panicle . 



6. J. tenuis. 

 Eootstocks creeping; stems leafy throughout; leaves }% lines wide: 



flowers clustered .7. J. Jalealus. 



Stems anciptally compressed; leaves equitant, transversely ribbed by 

 internal septa. 

 Leaves 2 to 4 lines wide; stems more or less winged below the nodes; 



seeds reticulate 8. X xiphUndes. 



Leaves H'o 1 ""e wide; stems not winged; seeds with the longitudinal 



lines closely crossed bv prominent fine transverse ridges 



9. J. phxocephcdus. 



1. J. bufonlus L. Toad Rush. Annual; roots fibrous; stems 

 1 to 12 in. high, terete, branchiBg from the base, leafy; leaves narrow; 

 inflorescence a dichotomous cyme; flowers solitary and ronote, to 

 closely secund or even sub-capitate; perianth lobes 3 lines long, long 

 acuminate, greenish with white searious margins. 



One of the commonest species, exceedingly variable in size and 

 aspect: Agnews, -IZ/.s-.s Cannon; Marin Co.; near the Montezuma 

 school, Solano Co., Jepson; Yountville, Clarke; Knights Talley, 

 Sonom'aCo.; TVest Berkeley; Stege. May-Sept. 



2. J, uncialis Greene. Dwakf Ettsh. Depauperate annual f to 

 1 in. high; leaves short, radical; stems scapiform, strictly 1-flowered; 

 perianth segments IJ to Klines long, acute, hyaline, with a prominent 

 mid-nerve;' capsule 'obtuse, apiculate, equaling the perianth; testa 



reticulate. . .• . 



Type locality: "low moist places in fields near Suisun, California, 

 May, 1890," Greene. 



3. J. Leseurii Boland. Salt Etjsh. Perennial; rootstock stout- 



