White Snakeroot (also known as Richweed or White Sanicle)  Scientific Name: Ageratina altissima (formerly Eupatorium rugosum)  Family: Asteraceae (Daisy/Composite family)  Key Features: Features dense clusters (corymbs) of small, bright white, star-like disc flowers lacking ray petals, set above coarsely toothed, opposite leaves with prominent veining. It is a common native perennial found flowering across eastern North America in early to mid-autumn. (Narration - Gemini AI)