206 HEXANDRIA—POLYGYNIA. Alisma. 



Like the last in general appearance, but differing essentially, ac- 

 cording to the authors quoted, in having several procumbent 

 leafy stems, throwing out radicles, with 1 or 2 leaves, and as 

 manyjlowers, here and there, from the joints, in the manner of 

 A. natans. Towards the ends of the stems it appears that the 

 flowers are not accompanied by leaves. The petals are pale 

 purple, and, according to Cavanilles, crenate. I have not seen 

 a specimen. - ,; , / _ 



