Cup Plant
Silphium perfoliatum
Family: Asteraceae
Flowering Time: July to August
Flower Color: Yellow
Growth Habit: moist, rich soils
Zones:  3 to 9
Environment: Full sun
Plant Height: 4 to 8 feet
Spread: 1 to 3 feet
Tolerates: Clay soil, wet soil
Water: Medium to wet
Maintenance: Low
Native Range: North America
Other uses: Attracts birds and butterflies