62 



BE AC TS. 



Plate XIX. 



12 



General subject. Define the term. Name each figure. How is the Bract 

 in the amentaceous trees in the Sun-flower tribe in the Fennel tribe in the 

 Grasses? When the bracts inclose many flowers what are they called ? What 

 figures in the plate represent the Involucre, and to what tribes do they belong ? 

 What corresponds with the involucre in Grasses, and what are the parts that 

 inclose the single flower? How are the bracts in fig. C fig. 8 fig. 9? What 

 do they form in flg. 11 flg. 12 ? What peculiar form at fig. 13 ? What are rep- 

 resented in figs. 4 and 5 ? 



