ii2 TRILLIUM. 



Strip some epidermis from the upper and lower sides, 

 and notice 



b. The shape of the cells, and presence or absence of 

 stomata in each. Draw. 



2. The petals. Make a transverse section through the 

 middle of a petal, and notice 



a. The several parts seen in the leaf. Draw. 



Strip some epidermis from the upper and lower sides, 

 and notice 



b. The shape of the cells and presence or absence of 

 stomata in each. Draw. 



3. The stamens. Make a transverse section through the 

 middle of a filament, and at the same time through the 

 middle of the anther, and notice 



a. The parts of the filament. 



i. The epidermis, with a minutely sinuous out- 

 line to the free surface. 



ii. ^ht parenchyma beneath. 



iii. The central fibro-vascnlar bundle, consisting 

 largely of xylem, with only a few small groups 

 of scattered phloem cells on the more convex 

 (outer) side. 



b. Draw part of the filament. 



c. The connective, with tissues like those of the fila- 

 ment. 



d. The theca, consisting of 



i. The two valves usually broken away at the 



tips, springing from 

 ii. The base which merges into the connective. 



e. The wall of the thecal valves. Note 



i. The epidermis, like that of the filament but 

 with numerous stomata, seen in transverse 

 section. 



