Zinnias have ray flowers and disk flowers. one has starlike structures and the other has two stringy structures merging to one. just wondering which is the stamen and which one is the pistal.
Zinnia hybridization
MGM,
The female part of the zinnia is the stigma at the base of each petal. That is what you referred to as "two stringy structures merging to one." For more information on zinnia flower anatomy, see http://www.backyardnature.net/fl_zinni.htm
MM