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protected by foliaceous spathes. Upper part 

 of spaclix $ ; perigoninm 0; anthers basifixed, 

 irregularly mixed with scales. Lower portion 

 of spadix ?; ovaries surrounded at their bases 

 by Go-bristles, sometimes by 3 scales; stigma 

 1, lateral. Fruit a utricle; endosperm copious. 

 Leaves linear, straight-nerved. Aquatic. — 2^. 



1. Sparganium Toaru. 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 Touru. (Jat-tail. Flag. 



Flowers in a club-shaped, continuous spadix. 

 S : filaments connate, very short. ? : ovaries 

 stipitate, surrounded by oo bristles. 



1. T. LATiFOLiA L. — Common. Summer. 



Series 3. HELOBUS. Aquatics. Type 

 generally ternate. Seed nearly without endos- 

 perm. Embryo with very pronounced radicle. 



Order 1. POLYCARPICE. Ovaries 3- oo. 

 Endosperm entirely wanting. 



Family 1. ALISMACE^ 



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

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



