Lettuce gone to seed

We had a leftover lettuce plant that volunteered this year. Considering it was planted 2 years ago we decided to water it and let the super thing grow. It is a type of red lettuce similar to butter head. I like most mortals had never seen what a lettuce flower looks like, and wondered how do you get lettuce seeds. Wonder no more.


No it's not a weed but it sure looks like one....