JUNCACEAE. 



73 



1. JUNCUS L. Rush. 



Perennial or sometimes annual, glabrous plants, grow- 

 ing usually in marshes or wet places, with simple terete 

 or flattened, usually pithy stems. Leaves terete, chan- 

 nelled or flat. Flowers solitary or clustered in cymes, 

 panicles or heads, greenish or brownish. Stamens 6 or 3. 

 Capsule 3-celled, or 1-celled with 3 parietal placentae, 

 many-seeded. 



Annual, with low branching stems. 

 Perennials. 



Flowers solitary on the pedi- 

 cels, each surrounded by 

 2 bractlets; pedicels 1 

 bracteate at base; stems 

 leafless or with terete 

 basal leaves. 

 Stamens 3. 

 Stamens 6. 



Stems sulcate with sub- 

 epidermal fascicles. 

 Flowers 4-5 mm. 

 long; perianth- 

 segments closed 

 over the capsule. 

 Flowers 3 mm. 

 long; perianth- 

 segments diver- 

 gent. 

 Stems smooth. 

 Stems terete. 

 Stems compressed. 

 Flowers bracteate only at the 

 base of the pedicel. 

 Flowers lateral, the lowest 

 bract apparently con- 

 tinuous with the stem, 

 pungent. 

 Flowers terminal. 

 Leaves septate. 



Leaves ensiform, the 

 edges turned 

 toward the 

 stem. 

 Stems wingless; 

 styles long- 

 exserted. 

 Stems narrowly 

 winged; styles 

 short. 



1. J. bufonius. 



2. J. effusus. 



3. /. textilis. 



4, /. patens. 



J. halticus. 

 J. mexicanus. 



7. /. acutus sphaerocarpus. 



J. phaeocephalus paniculatus. 



9. /. xiphioides. 



