Cup Plant

Cup Plant is one of the tallest plants of the prairie. The flowering stem grows blooms with one or several yellow composite sunflower-like flowers. Leaves are large, broad, and have a rough texture.
 
Leaves hug the stem in such a way that they create a space where water can collect like in a cup, giving the plant its common name. Often it supplies water to various insects or birds.
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Young cup plant before blooming with compass plant flower in the back (Meadowbrook Park, Urbana, IL)
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Cup plant detail: leaves form a cup around the base often with collected water (Meadowbrook Park, Urbana, IL)
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Blooming cup plant (Lake of the Woods, Mahomet, IL)
It's one of the four plants sometimes grouped as resin weeds (or, rosinweeds): Compass Plant, Cup Plant, Prairie Dock, and Rosinweed.
Scientific Name: Silphium perfoliatum