Then there's this plant pathogen, Sclerotium rolfsii that he was the first to describe. Perhaps this picture of mitosis in the plant could be some inspiration for me. :) (Picture taken from here)
Then, there's the other side of the family. I have some Irish roots through my grandmother, and have a grandfather who has been a professional musician for over 70 years. In fact, I've already converted a photo of him playing saxaphone into a pattern that I might bead up for a christmas present.
So there are my ideas so far - something orange and blue (go gators!), Sclerotium rolfsii, or Grandpa playing the saxophone. Or something agriculture-themed. I probably won't do something Irish themed, because I'm more intrigued by my other ideas. :)