Purple flowers with yellow center, grows to 12 inches. Clumping foliage. Best in sun. Zones 5-9.
Kalimeris incisa 'Edo Murasaki'
Bright golden yellow, double flowers on 5 ft bushes. Zone 5-9. Best in sun.
Kerria japonica 'Plentiflora'
Double Flowered Kerria
Bright yellow flowers on white and green foliage to 3 ft. Sun or partial shade. Zone 6-9.
Kerria japonica picta
Dwarf Vareigated Kerria
Ruby-red flower heads from Summer to Fall. Compact plants to 16 inches. Best in sun.
Knautia macedonica 'Mars Midget'