130 



THE SCIENCE OF LIFE. 



butterflies, moths, flies, and spiders ; or birds, as doves 

 and eagles ; or reptiles, as snakes, lizards, and frogs. 

 (Fig. 53.) Their spots and colors give sometimes the 

 appearance of leopard or tiger skins. These resemblances 



are indicated in their 

 generic and s p e c i fi c 

 names. Some parts of 

 the petals of these flow- 

 ers display peculiar irri- 

 tability, for the purpose 

 of scattering the fertiliz- 

 ing pollen. As the vis- 

 its of insects are often 

 subsidiary to the fertili- 

 zation of Orchids, they 

 have attracted much at- 

 tention from naturalists. 

 They abound chiefly in 

 moist tropical climates. 



9. The LlLY family 

 (Liliacece) includes many 

 showy garden flowers, 

 as Tulips, Lilies, Dog- 

 tooth-violets, and Tube- 

 roses. (Fig. 54.) It is 

 divided into several 

 tribes, as the Onion, or 

 Squill tribe, the Aspho- 

 del tribe, the Lily-of-the- 

 valley tribe, the Aloes 

 FIG. 54. The white L:i y , (Luium aidvm.) tribe, and the Asparagus 



