ENDOGENS. 73 



in their flowers, which often resemble insects, birds, 

 and lizards. The visits of insects are often needed 

 for their fertilization. 



16. The Lily family, including many garden flow- 

 ers, as Tulips, and Lilies, (Fig. 32,) as well as such 

 plants as the Onion, Squill, Aloes, and Asparagus, is 

 a beautiful representative of the type of Endogens. 

 Other families, as that of the Bulrushes, have in- 

 complete flowers. 



