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. 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!