Campaign for Citizen Scientists after reading about it over at Lake Loop. Go to one of those links to read more about it. I've been keeping phenological data for over 40 years, so was thrilled to see this. I have only signed up for the dandelion and the lilac so far, but intend to sign up for more locations and more flowers, hopefully.
Phenology is the study of the times that natural events occur, such as flowering and fruiting. Laying eggs, giving birth. Emerging from hibernation. This study focuses on common, easily identifiable plants.