Skullcap
Scutellaria incana

Hardiness: Zones 5 to 8
Plant type: Herbaceous perennial
Height: 2 - 3'
Spread: 1.5 - 2'
Sun: Full sun to part shade
Water: Dry to medium 
Bloom time: July to September
Bloom color: Blue
Soil: Average, well-draining, sandy soil, tolerate clay.

Notes: Traditional medicinal plant, attracts hummingbirds and bumblebees.

More information on this plant here.