FLY-FLOWERS 



Fig. 77. Purple Trillium. Trillium erectum 



A fly-flower 



compelled to throw away. Since the blossoms are nectarless, 

 they are visited only occasionally by flies for pollen. Its pene- 

 trating characteristic odor, it is needless to say, prevents any one 

 from making such a mistake in the case of the skunk-cabbage. 

 Within each spathe or leafy hood there is a cluster of small, 



163 



