Explanation of PL V. 



ium graciUimum HAY ATA. 



Ficr. 1. A branch. 



O 



2. A head. 



3. A flower. 



4. Corolla. 



5. An apical portion of the same corolla. 



6. Stamens. 



7. A style with the basal stylopoiUum. 



8. A achenc. 



i. A pappus-hair. 



