Showy coneflower (or Sullivant's coneflower) is a naturally occuring variety of Rudbeckia fulgida. It doesn't require as much water as other varieties, has slightly larger flowers, and tends to be more clump-forming. Bright yellow flowers attract plenty of pollinators.
Uses: Rain gardens, butterflies, bees
Bloom time: July - September
Height: 20 to 30 inches
Space: 16 to 20 inches
Sun: Full sun to light shade
Moisture: Average to moist