The current Wits End Weekly Photo Challenge is Repeating Patterns.
My first thought was snow on evergreen branches as I have taken a few shots that would work recently. However, patterns in nature is something that I have photographed over the years and I had a selection to pick from.
In the end I went with a photo of London Pride, a fairly common garden plant in the U.K. I find the toothed leaves interesting and the red centre to the rosette of leaves add to the pattern. The red centres are where the plant is starting to flower.