A GUIDE AND KEY TO AQUATIC PLANTS 



57 



51. Flowers purple; plant usually corky at base (fig. 44). _ Lythrum, p. 126. 

 51. Flowers white or pink; plant usually not corky at base. 52. 



52. Flowers pink (fig. 37) Hypericum, p. 123. 



52. Flowers white, or, if pink, with a yellow or Sabatia, p. 133. 

 green eye in center (fig. 45). 



Figure 44. 



Figure 45. 



53. Flowers solitary in the leaf axUs 54. 



53. Flowers in terminal clusters (fig. 46) Cynoctonum, p. 133. 



54. Flowers with small appendages between the Rotala, p. 125. 



sepals (fig. 47). 



54. Flowers without small appendages between Didiplis, p. 125. 



the sepals (fig. 48). 



Figure 47. 



xy4 



Figure 48. 



