A GUIDE AND KEY TO AQUATIC PLANTS 



39 



6. Flowers or fruits hidden by overlapping scales Scirpus, p. 91. 



(fig. 4). 

 6. Flowers or fruits individually manifest; parts Juncus, p. 107. 



in threes (fig. 5). 



x'/2 



x/6 



Figure 4. Figure 5. 



7. Stems round in cross-section 8. 



7. Stems angled in cross-section 10. 



8. Stems large and long (1 meter or more) Scirpiis, p. 91. 



8. Stems shorter 9. 



9. Sheaths at base of stem with edges united to form tube Eleocharis, p. 88. 



(fig. 6). 

 9. Sheaths at base of stem merely overlapping (fig. 7)... Juncus, p. 107. 



X I 



Figure 6. 



Figure 7. 



