Pearly everlasting
Anaphalis margaritacea

Hardiness: Zones 3 to 8
Plant type: Herbaceous perennial
Height: 1 - 3'
Spread: 1 - 2'
Sun: Full sun to part shade
Water: Medium 
Bloom time: July, August
Bloom color: White with yellow centers
Soil: Average, sandy well-draining soil, tolerates poor soil.

Notes: Valued highly for dried flower arrangements.

More information on this plant here.