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1. Juncus L- Bog-Rush. 

 Perigonium 6-sepalous; 3 external sepals 

 carinate. Ovary 8-celied; cells oo-ovulate. 

 Capsule 3-valvecl, with central placentae, oo- 

 seecled. Mostly aquatics. 



1. J. ROBUSTUS Watson. Stem naked. In- 

 florescence lateral; flowers of the panicle 

 branches clustered; leaves terete and pungent. 

 U- Santa Clara. Summer. 



2. J. Leseurii Bolander. Stem naked, te- 

 rete; inflorescence lateral; flowers of the com- 

 pound panicle branches solitary; leaves 0; 

 capsule oblong, acute, but not rostrate. — It- 

 Presidio. Summer. 



3. J. Balticus Detliard. Stem naked, te- 

 rete; inflorescence lateral; flowers of the com- 

 pound panicle branches solitary; leaves 0; 

 capsule oblong, rostrate. — Common. Summer. 



4. J. COMPRESSUS HBK. Stem naked, 

 somewhat flattened; inflorescence lateral; flow- 

 ers of the loosely few-flowered panicle solitary; 

 leaves terete, sometimes 0; capsule oblong. 

 21 . Santa Clara. Summer. 



5. J. Breweri Engelmann. Stem naked, 

 somewhat flattened; inflorescence lateral; flow- 

 ers of the small, but dense panicle, solitary on 

 their branches; leaves 0; capsule oblong. — U- 

 Santa Cruz. Summer. 



