The Sonian Forest at the beginning of Messidor

Where are the pretty flowering plants… (and the others?) in the heart of the Sonian Forest, its valleys and clearings, by the side of the path? Meet at 9:30 AM, in the parking lot at the end of Avenue Schaller, in 1160 Auderghem. Bus 41 and Herrmann-Debroux metro nearby. Bring walking shoes and a magnifying glass. Expected end around 12:30 PM.