silphium perfoliatum

Silphium perfoliatum, the cup plant or cup-plant, is a species of flowering plant in the family Asteraceae, native to eastern and central North America. It is an erect herbaceous perennial with triangular toothed leaves, and daisy-like yellow composite flower heads in summer.The specific epithet perfoliatum means 'through the leaf.'There are two varieties:-

S. perfoliatum var. connatum

S. perfoliatum var. perfoliatum.

S. perfoliatum grows in sandy moist bottom lands, floodplains, near stream beds, ...