202 BOTANY. 



Material. — Entire plants of trillium and dentaria in flower, with root 

 stock. Specimens either fresh or dried. Entire flowers of both plants 

 when they cannot be obtained at the right season, may be preserved in ad- 

 vance in formalin. A sufficient number should be prepared, depending on 

 the number of pupils in the class. Mature fruit may also be preserved in 

 formalin or alcohol. It will be useful to have entire plants of trillium col- 

 lected in late autumn, in the winter, or early spring before the flower stalk 

 rises above the ground, in order to see the condition in which the flower 

 passes the winter. 



