Silphium perfoliatum- Cup Plant Size:SILPER-PINT pinnately compound leaves have a

pinnately compound leaves have a soft feel and give its mounded form a unique feathery appearance

the flower stalks it sends up in summer make Prairie Dock one of the tallest plants native to Illinois

Spreads via rhizome such that it is considered aggressive and should be reserved for large garden spaces

it will be shorter in drier soils

Silphium perfoliatum- Cup Plant Size:SILPER-PINT pinnately compound leaves have aCup Plant is so named because its opposite leaves fuse at the stem to form a cup like shape that holds water, attracting birds and other small fauna all season long. Its sturdy, upright stems are hairless and square (unique among silphiums), and unbranched until the top, where multiple floral stalks bear bright yellow, 3in sunflower like flowers. Pollinators visit these blooms all summer long and then goldfinches and other songbirds flock to eat the