Silphium terebinthenacium [sold as Prairie Dock]
Prairie Dock

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Flower Notes:

Flowers are sunflower-like with yellow rays and yellow centers. They bloom in loose clusters on the upper parts of the plant.

Foliage Notes:

Huge oval to heart-shaped, dark green leaves are up to 2' long.

Stem Notes:

Almost leafless stems branch to 10' tall.

Fruit Notes:

A dry, flat, single-seeded achene. These seeds are tiny (7-13mm long). They feature distinct broad wings. The seeds are attractive to birds.

Ultimate Height:

3-10' feet

Ultimate Spread:

1-3' feet

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Soil Notes:

Best grown in average, medium, well-drained soils.

Range:

Native to prairies, glades, fens, railroad right-of-ways, and other exposed habitats in the Midwest.

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