We have a wild Iris that looks a lot like that. It dates back to 1800
when a settler put a note about it in his journal that he had a wild
Iris that grows down by the creek. He had just homesteded the land.

Mel & Donnie down in Bluebird Valley In the middle of beautiful down
town Yountsville. Managers of the water works.
http://community.webtv.net/MelDKelly/doc

http://community.webtv.net/MelDKelly/MelDonniesBluebird