I remembered hearing somewhere that lily flowers are edible. My parents have a ton of tiger lilies in their yard, so I decided to try eating them. Most of the plant is edible including the small potato-like roots. When cultivated for the root, the unopened flower buds are removed to stimulate root growth[
1]. This explains the presence of the flower buds aka "golden needles" in Chinese and Thai cuisine.
I battered and deep fried some of the flowers, and added the rest to a stir fry. When eaten raw, they have a slight peppery flavor.
On a side note, echinacea is growing everywhere in Illinois!