A GUroE AND KEY TO AQUATIC PLANTS 



53 



30. Leaves all from one point, or mostly all basal, 33. 

 or from points along a horizontal stem. 



30. Leaves distributed along the upright stem 31. 



31. Leaves opposite.. 32. 



3 1 . Leaves alternate or irregularly borne 40. 



32. Leaves entire or nearly so 41. 



32. Leaves prominently toothed 55. 



33. Leaves from points along a horizontal stem, peltate. _ 34. 



33. Leaves mostly basal, not peltate 35. 



34. Leaves large, 2 dm. or more in diameter, Nelumbo, p. 117. 

 impossible to wet; flowers solitary, showy, 

 yellow (fig. 29). 

 34. Leaves small, only a few cm. across; flowers Hydrocotyle, p. 130. 

 small, white, and in close clusters (fig. 30). 



Figure 29. 



35. Leaves with several veins running from base to tip 36. 



35. Veins not as above (fig. 31) Rumex, p. 113. 



36. Leaves with several very prominent ribs Alismaceae, p. 72. 

 running from base to apex (fig. 32). 



36. Leaves without prominent ribs 37. 



Figure 31. 



