62 



BE AC TS, 



Plate XIX. 



General subject Deflno the term. Name each figure. ITow is the Bract 

 in the amentaceous trees— In the San-flower tribe — in tlie Fennel tribe— In the 

 Grasses? When tlie bracts inclose many flowers what are they called? Whnt 

 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. 6 — fig. 8— fig. 9 ? "What 

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

 resented in figs. 4 and 5 ? 



