Vervain: Hoary (Verbena stricta)

Native Perennial (from the midwest, introduced in New England). Best name.

From Wild Seed Project: Hoary vervain is a short-lived perennial of dry prairies. Its lavender-blue flowers bloom for over a month in July and August with fuzzy, gray-green foliage. This plant makes a dramatic addition to any landscape with very dry soil. Establish in a meadow or plant as a large group in a dry perennial bed or urban sidewalk strip. Numerous pollinating insects visit the flowers in bloom, the foliage serves as a host for the Buckeye butterfly, and birds relish the seeds in winter.”

Height: 2ft, Sun: Full-Partial, Soil: medium-Dry to Dry, Plant spacing: 1ft