XXXI. LEMNACE^]. 



s:j'J 



used as vegetables in the Antilles. The rhizomes of our Arum macidatum and Colin palmtrix, bruised, 

 washed, and mixed with the farina of cereals, serve, according to Pallas, as food for the poor populations 

 of Lapland and Finland. Arum starch is sold in London under the name of Portland Arrowroot. 



Acorus Calamus, now naturalized in various parts of Europe, yields an aromatic acrid and bitter 

 rhizome, used as a tonic and excitant, and entering into the composition of some compound medicines ; 

 the same is the case with A. gramineus, a native of China. The herbage of Pistia, brought each year 

 from Central Africa to Egypt, was formerly prescribed Tis an emollient and refrigerant. 



The long adventitious roots of several Aroidece, and particularly those of Phyllodendron, designated in 

 Central America under the names of Imbe, Oiimle, &c., are used as cords to tie up the bundles of Sarsa- 

 parilla which are sent to Europe. 



XXXI. LEMNACEJE. 



, D.C. et Duby, Link, Schleiden. PISTIACE^E, Lindl. in part.} 



L. minor. 

 Inflorescence (mag.). 



L. minor, 

 Pistil laid open (mag.). 



Lemna minor (mag.). 



L. trisulca. 

 Inflorescence (mag.). 



L. trisulca. 

 Ovule (mag.). 



L. trisulca. 

 Fertile frond (mag.). 



/,. trisulca. 

 Embryo (mag.). 



L. trisulca. 



Pistil cut vertically 



(mag.). 



L. triiulca. 

 Sterile frond (mag.). 



L. trisulca. 



Seed, with and without its 

 testa (mag.). 



L. trisulca. 



Seed cut vertically 



(mag.). 



