I have had a small review on the evolution of branching forms published in New Phytologist. You can read the article here.
I greatly enjoyed examining Bobby Caine's PhD thesis in Sheffield on Friday. He has two lovely papers out on the evolution of genetic networks for stomatal development, one on the bHLH transcription factors that are necessary for stomata development in Physcomitrella, and one on the mechanisms that pattern Physcomitrella stomata. There should be more on the way too!