Chelone glabra, Turtlehead

White turtlehead
Chelone glabra

Hardiness: Zones 3 to 8
Plant type: Herbaceous perennial
Height: 2- 3'
Spread: 1.5- 2.5'
Sun: Part shade
Water: Medium to wet
Bloom time: August to October
Bloom color: White with pink tinge
Soil: Moist, organically rich soils, neutral (≈7), alkaline (>7pH)

Notes: Attracts hummingbirds, butterflies, bees, and other pollinators, major host of of the Baltimore checkerspot butterfly

More information on this plant here.