GROWTH AND DEVELOPMENT OF THE INFLORESCENCE AND FLO^VER 



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Figure 11. The first three pictures show stages in the development of the capituKim of 

 Tussilago faiiara L. as seen from above, after the fohage leaves and bracts have been 

 dissected off. Magnification: X 30. {a). The formation of florets is beginning around the 

 base of the capitulum meristem. {h) . Florets have now been formed, in acropetal se- 

 quence, well up toward the summit, or center, of the capitulum. (c). The last-formed 

 florets — male, disc florets — at the center of the capitulum meristem have now out- 

 grown the surrounding older florets. The next four pictures are longitudinal median sec- 

 tions of capitula at various stages of development, (d). A young capitulum; no florets 

 have yet formed (X 112). {e) Floret formation is beginning around the base of the 

 capitulum, as in (a) (X 75). (/). The terminal, disc, florets have enlarged, (g). They 

 are now conspicuously larger than the earlier-formed ray florets (X 50). 



