I've seen some really pretty teeth that protrude from the middle of the petal surface that are more than one color...matching the double edge of the flower. One in the garden this morning was just plain yellow on a pink daylily. I'm seeing these often enough that I think it may be the next thing that evolves. Other strange things are a single ruffle in places you would not see them normally....like the midrib on the back of the petal. Another fun aspect of seeing what's new in the garden each morning!