Taxonomic Name: Silphium perfoliatum

Common Name: Cupplant

Type: Herbaceous perennial

Garden: Pond Garden

Zone: 4, 5, 6, 7, 8

Bloom Time: July to September

Height: 36-120 inches

Light Requirements: Full sun

Soil Conditions: Average well-drained soil

Flower Color: Yellow

Special Characteristics:

• Silphium terebinthinaceum has huge oval to heart-shaped, dark leaves. It is topped off by sunflower-like flowers with yellow rays and yellow center disks in loose clusters