(322) 



protected by foliaceous spathes. Upper part 

 of spadix $ ; perigonium 0; anthers basifixed, 

 irregularly mixed with scales. Lower portion 

 of spadix ? ; ovaries surrounded at their bases 

 by co-bristles, sometimes by 3 scales; stigma 

 1, lateral. Fruit a utricle; endosperm copious. 

 Leaves linear, straight-nerved. Aquatic. 1. 



1. Sparganium Tourn. BUR-REED. 



Flowers in crowded glomerulate heads, con- 

 stituting a simple or a branched spadix. Fila- 

 ments slender. Ovaries sessile, surrounded by 

 some linear scales. 



1. S. EURYCARPUM Engelm. West Oakland 

 (extinct); rediscovered at Niles. Summer. 



2. Typha Tourn. CAT-TAIL. FLAG. 



Flowers in a club-shaped, continuous spadix. 

 $ : filaments connate, very short. ? : ovaries 

 stipitate, surrounded by o bristles. 



1. T. LATIFOLIA L. Common. Summer. 



SERIES 3. HELOBIZE. Aquatics. Type 

 generally ternate. Seed nearly without endos- 

 perm. Embryo with very pronounced radicle. 



ORDER!. POLYCAKPIOE. Ovaries 3- oo. 

 Endosperm entirely wanting. 



Family 1, ALISMACE.E 



Calyx 3-sepalous. Corolla 3-petalous. Stam- 

 ens 6-00 . Ovaries 3-co , with terminal styles 



