A GUIDE AND KEY TO AQUATIC PLANTS 



45 



29. Leaves round 30. 



29. Leaves flat .-- 32. 



30. Flowers few, showy, pinkish purple (fig. 23).. Coreopsis, p. 140. 



30. Flowers many in compound umbels, ineon- 31. 

 spicuous. 



31. Fruit flattened laterally; fruit not winged (fig. 24) Ptilimnium, p. 131, 



31. Fruit flattened dorsally; fruit prominently winged Oxypolis, p. 131. 

 (fig. 25). 



• XIO 



Figure 23. 



Figure 25. 



