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solid , but in Lemna there is the slit on one side for the emission of the plumula, 

 just as in Aroideae. In Dr. Hooker's Botanical JVLiscellany, part 2, is an ac- 

 count of the germination of Lemna, by Mr. Wilson of Warrington, which is 

 worth consulting. Agardh refers Lemna to Urticere, and places Nepenthes 

 here. 



Geography. Lemna inhabits the ditches of the cooler parts of the world ; 

 Pistia the tropics. 



Properties. Pistia Stratiotes grows in water-tanks in Jamaica, where, 

 according to P. Browne, it is acrid, and in hot dry weather impregnates the 

 water with its particles to such a degree as to give rise to the bloody flux. 

 Hist, of Jam, 330. A decoction of the same plant is considered by the Hindoo- 

 stanees as cooling and demulcent, and they prescribe it in cases of dysuria. The 

 leaves are also made into a poultice for the piles. Mnslie. 



Examples Pistia, Lemna. 



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