There are actually a few different flowers that represent freedom which include the yellow rose and the tulip. The other is the bird of paradise flower.
The Poppy
The bird of paradise represents political freedom and personal freedom, freedom and independance mean basically the same thing in this context)
the flower-Iris
Is the flower you choose ;)
Heliotrope represents faithfulness which is a synonym of loyalty.
It represents our freedom,beauty,& many more
Your religion
it represents freedom
Sunflower
lily
The globe thistle.
Coral rose
carnation