NATURAL SYSTEM. 187 



I. Phanerogamia. Plants that bear Flowers. 

 II. Cryptogamia. Plants that do not produce Flowers. 



Suit-divisions of Flowering Plants. 



1. Dicotyledones Plants whose embryo has two seed 



leaves, or more than two. 



2. Monocotyledones Plants whose embryo has one 



seed leaf. 



468. Linnaeus, a Swedish botanist, in 1736, while 

 only twenty years of age, published the outlines of 

 his celebrated sexual system, based upon the num- 

 ber, situation, and relative length of the pistils and 

 stamens, which, though artificial and misleading, earned 

 for its author a deathless fame. 



469. In 1789, A. L. de Jussieu, embodying the 

 grand features of Ray with those of Tournefort, laid 

 the foundation of the natural system which, under 

 various modifications, has come down to us. 



470. August P. de Candolle greatly modified the 

 arrangement of Jussieu, especially by reversing the 

 sequence, placing the most highly organized plants 

 first in order. 



The following is a brief sketch of the latest ar- 

 rangement, and is substantially the one mapped out 

 by Sachs ; the order of sequence, however, is changed : 



471. Phanerogamia. Flowering plants, or plants 

 whose flowers or organs of fructification are exposed 

 to view. 



Plants of this class have roots, stems, and leaves 

 through which bundles of woody fiber extend ; they 

 bear flowers, in special parts of which reproductive 

 organs are- produced that form embryonic bodies 



