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 

 many Jl OIL- ers, here and there, from the joints, in the manner of 

 j4. 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. 1 have not seen 

 a specimen. 



Since the above account was published, I have received from the 

 Rev. Charles Burton, LL.B. of Manchester, and from Mr. W. 

 Wilson of Warrington, various specimens of Alisma repens, 

 gathered about the margins of several lakes in Anglesea. Of 

 these the smaller ones agree exactly with the figure in Cava- 

 nilles ; but the larger having stems from one to two feet long, 

 and, though prostrate, less disposed to throw out radicles, ap- 

 proach so nearly to A. ranuncidoides, w^hich frequently bears 

 reclining stalks, if not leafy ones, that I concur with both my 

 obliging correspondents in thinking the A. repens no more than 

 a variety, differing from ranuncidoides as Ranunculus reptans 

 does from R. Flnmmula; see v. 3. 45. It flowers in July and 

 August. 



