M On the Management of Aquatic Plants. 



leaves more oval than those of Menyanthes exaltata, but ris- 

 ing above the surface of the water, on footstalks ; the flowers 

 yellow, on a scape longer than the petioles of the leaves ; it 

 requires to be placed in shallow water ; flowers in June and 

 July. Introduced in 1786, and is figured in the Botanical 

 Magazine, Plate 1909. 



6. Menyanthes Indica : from the East Indies, and the Cape 

 of Good Hope ; leaves like those of Menyanthes sarmentosa, 

 but of a bright shining green; the peduncles of the flowers 

 are produced out of the petioles, near the base of the leaves, 

 whence roots also are thrown out ; flowers of a delicate pale 

 yellow colour, growing in tufts, or bunches ; thrives well in 

 water three or four inches deep ; flowers most part of the 

 summer. Introduced in 1792, and is figured in the Botanical 

 Magazine, Plate 658. 



7. Menyanthes trachysperma : a native of North America; 

 in habit very much like the last, bearing its flowers, which 

 are white, in the same manner. Introduced in 1812, but has 

 not as yet been figured in any Botanical work. 



The two first species are hardy, and require no protection; 

 the 7th stood out last winter, in the pond at the Apotheca- 

 ries' Garden, Chelsea ; the 3d and 4th did the same with me ; 

 but the season being remarkably mild, it might be wrong, on 

 that account, to decide, that they are hardy ; perhaps it would- 

 be best to remove them into the green-house, in a severe 

 winter. The 5th requires this shelter, and will not live with- 

 out it; and the 6th species needs the heat of the stove 

 through the winter, but thrives and blooms best in a close 

 frame, during the flowering season. 



