Trillium Ridge Flora and Fauna
Wild Senna
Cassia hebecarpa 
Bunches of butter-yellow flowers appear in July and August on the robust stems, reaching up to six feet tall.The attractive foliage is borne in large leaflets, typical of the Pea Family to which it belongs.The brown seedpods add interest in the fall and winter and are utilized by birds and other wildlife. Give this guy some room to spread out and it will repay you with an exuberance of foliage and blooms. Particularly fond of clay, it does well in medium to damp soils.Will tolerate periodic flooding.
Link photo  
Genus: Cassia (legumes)
Family: Fabaceae (legume family)
Order: Fabales (fabales)
Class: Magnoliopsida (Dicots)
Phylum/Division: Magnoliophyta (Flowering plants)
Kingdom: Plantae (Plants)