376 TLEIOTAXY OF TUE 



disposed in an iri'egular spiral manner at the extremity 

 of the stem, some of the uppermost being occasionally 

 verticillate.^ 



Fia. 190. Double white lily. Multiplication of perianth-segments 

 and other changes. 



Pleiotaxy of the corolla. With reference to double 

 flowers, it was remarked by Linne that polypetalous 

 flowers were, as he said, multiplied, while monopetalous 

 flowers were duplicated, or triplicated, as the case may 

 be,' a statement that is true in the main, though it 



1 Schlechtendal, ' Bot. Zeit.,' xx, 1862, p. 301. 



2 ' Phil. Bot.,' 126. 



