8AGITTABIA JUNCACE^E 679 



JUNCOIDES 



pi. 1. Glabrous or nearly so, terrestrial or partly submerged: scapes weak, 

 ascending, 8-20 inches high : leaves sagittate, long-petioled, the blade 3-10 

 inches long, acute, the lobes divergent, acute or acuminate : bracts lanceo- 

 late, acute, 4-10 lines long, scarious-margined and obscurely veined, often 

 reflexed: 1-3 lower verticils pistillate: fruiting heads 4-8 lines in diameter: 

 achenes a line long, tumid, winged on both margins. Along streams and 

 borders of lakes, Brit. Columbia to California and Minnesota. 



Var. stricta J. G. Smith Ann. Rep. Mo. Bot. Card, vi, 8. Slender, 

 erect, 12-16 inches high : blade of leaf 1-3 inches long : scape simple : bracts 

 ovate, acute, 3-4 lines long: fruiting heads 6 lines in diameter: achenes 

 smooth or laterally unicostate. Boggy meadows and slow streams, Falcon 

 Valley, Washington. 



S. cuiieata Sheldon Bull. Torr. Bot. Club xx, 289, pi. 159. Sub- 

 merged aquatic, rooting in the mud: leaves sagittate, long-petioled, the 

 blade floating, 3-4 inches long, with linear lobes : scapes simple, slender, 

 terete, 2-3 feet long, bearing verticils of flowers at the surface of the water: 

 bracts ovate-lanceolate, acute, 2-3 lines long : stamens few : fruiting heads 

 small, about 6 lines in diameter: achenes)^ line long. In ponds or on 

 margins of lakes, Brit. Columbia to Washington and Minnesota. 



S. escnlenta. S. variabilis Engelm. in part. (WAPATOO). Glabrous 

 or nearly so: scapes simple or branched, 1-3 feet high: leaves large, the 

 blade 4-12 inches long, obtuse or abruptly acute, the lobes from lanceolate 

 to broadly ovate, acuminate, divaricate : bracts scarious, 3-5 lines long, 

 ovate, obtuse : achenes about 3 lines long, with rather tumid dorsal wing 

 and long horizontal beak. In shallow lakes, Brit. Columbia to California : 

 this species was very abundant along the lower Columbia river, but is now 

 almort exterminated by the Carp. 



ORDER CVII JUNCACE.E Vent. Tabl. ii, 150. (1799.) 



Mostly perennial herbs, cespitose or with creeping rhizomes, 

 terete hollow or spongy usually simple stems, alternate sheath- 

 ing flat, channelled or terete leaves and small usually sessile 

 scarious bracteolate flowers in panicles, cymes, subumbellate 

 clusters or spicate heads. Flowers perfect, with a regular per- 

 sistent perianth of 6 similar glumaceous segments in two rows, 

 3-6 nearly hypogynous included stamens with persistent filiform 

 filaments and 2-celled anthers, and a superior 3-celled ovary, 

 or sometimes one- celled with 3 parietal placentae, with three or 

 many anatropous ovules. Styles very short, with three filiform 

 stigmas. Capsule loculicidally 3-valved. Seeds with mem- 

 branous or cellular often caudate or appendaged testa. Em- 

 bryo minute, enclosed within the base of fleshy albumen. 



1 Jnncoides Stems leafy, hollow : leaves flat and soft, often villous : 



capsule 1-celled, with 3 parietal 1-seeded placentae. 



2 J uncus Stems usually with spongy pith : leaves terete or flat, not 



villous. 



1 JUNCOIDES Adans. Fam. PL ii, 47. (1763.) 

 LUZULA DC. Fl. Fr. Hi, 47. (1805.} 



Perennial herbs with simple hollow leafy stems, grass-like flat 

 leaves and numerous small flowers in loose involucrate umbels 

 or panicles, or more or less densely clustered or spicate. FJoral 



