CHAPTER VIII. 

 MONOCOTYLEDENOUS ANGIOSPERMS 



WIJiD YELLOW LILY (Lilium canadense) 



Habitat. The wild yellow lily usually grows in low moist 

 ground. 



Morphology. The underground part consists of a scaly 

 bulb, from the under part of which roots develop. During 

 the growing season an aerial stem forms and grows to the 

 height of about two feet. The stem is divided into units of 

 structure termed nodes and internodes. From a node a whorl 

 of several leaves develops. 



These leaves are parallel-veined, like all plants of this 

 group, and the vascular or conducting tissue is well developed. 

 During August the tips of the main stem and branches 

 develop large showy flowers, which contain the organs of 

 reproduction. 



Structure of the Flower. The flower of the lily is complete 

 and consists of the following parts : 



1. A calyx, consisting of an outer circle of three sepals. 



2. A corolla, consisting of an inner circle of three petals, 

 which closely resemble the sepals. 



3. An androecium , consisting of two sets or circles of 

 three stamens erfch. One set is opposite the three sepals, the 

 other set opposite the three petals. 



4. A gynoecium, consisting of one central pistil made up 

 of three carpels. 



The calyx and corolla are vegetative organs which, because 



