A GUIDE AND KEY TO AQUATIC PLANTS 



43 



21, Leaves arising from a bulb 23. 



21. Leaves not arising from a bulb 22. 



22. Leaves from base of scape bearing button- Eriocaulon, p. 106. 

 like whitish heads of minute flowers; roots 

 with cross-constrictions (fig. 15). 

 22. Leaves from base of scape bearing evident Sagittaria, p. 72. 

 white flowers in racemes; roots without 

 cross-constrictions (fig. 16). 



<? H 



Figure 15. 



Figure 16. 



23. Flowers with filaments connected by a funnel-like Hymenocallis, p. 109 



membrane (crown) (fig. 17). 

 23. Flowers with free filaments (fig. 18) Crinum, p. 109. 



FlGURE^lS. 



