Baptisia australis - Blue False Indigo
Commonly called blue false indigo, is an upright perennial with purple flowers that look similar to lupines. They have beautiful bluish-green leaves that resemble clover petals. It blooms in late spring and works well in borders, cottage gardens, and native plant gardens particularly when used in small groups. Its flowers become seed pods that turn charcoal black when ripe and have an ornamental interest.
"Seeds rattle around in the blackened pods which were once popularly used by children as rattles." - Missouri Botanical Garden
Height: 3 - 4ft
Sun: Full sun to part shade
Water: Dry to medium
Bloom Color: Indigo blue
Bloom Time: May to June