28 



PUBLIC HEALTH BULLETIN NO. 286 



11. Plant body repeatedly dichotomously branched (fig. 1). Riccia, p. 67. 

 1 1 . Leaves not dichotomously branched 12. 



12. Leaves entire not dissected or bearing blad- Anacharis, p. 75. 



ders, and whorled (fig. 11). 

 12. Leaves dissected and bearingjbladders (fig. 12) _ Utricularia, p. 137. 



Figure 12. 



KEY TO GROUP D 



1. Vegetative body formed of floating stenas without leaves. 2. 



1. Vegetative body formed of stems and leaves 4. 



2. Branches of stem bearing small bladders; Utricularia, p. 137. 

 flowers showy, purple (fig. 1). 

 [ 2. Stem or branches not bearing bladders; 3. 

 flowers absent or inconspicuous. 

 3. Plant body made up of smooth, proliferating stems Eleocharis. p. 88. 



(fig. 2). 

 3. Plant body made up of stems bearing whorled, brittle Chara, p. 67. 

 branches (fig. 3). 



Figure 1. 



Figure 2. 



FlQUBB 3. 



