186 



LUSSOIfS WITH PLANTS 



corolla, except that three of the parts are exterior 

 to the others. Such a series is called merely a 



perianth, and the parts, 

 when distinct, are usually 

 called sepals (173). It is 

 found in all lilies, and, in 

 fact, in most of the flow- 

 ers which are built upon 

 the plan of three (most 

 of the parts in threes 

 or multiples of three). 



212a. The perianth may he 

 gamosepalous, as in the lily-of- 

 the-valley, Fig. 182. This peri- 

 anth has six lobes, and there are 

 six stamens. Compare the flow- 

 ers of the common asparagus and 

 the hyacinth. 



213. The narcissus 

 (Fig. 183) is peculiar. 

 The sheath h cannot be a 

 calyx, because the ovary 



is at c, and is borne 



Pig. 183. 

 The narcissus. 



upon a distinct stalk or 

 peduncle. The part h 

 must be a spathe, com- 

 parable with that in the 

 calla (Fig. 168). It is 

 seen that the flower is 



