Glandularia bipinnatifida, commonly known as prairie verbena or Dakota mock vervain, is a low-growing, spreading perennial wildflower that typically reaches 6 to 12 inches tall with a broad spread of 12 to 36 inches wide, often forming an expansive, mat-like groundcover. Its branching, slightly hairy stems sprawl outward along the ground, sometimes extending up to 3 feet in length, rooting at nodes where they contact the soil. The deeply divided, fern-like leaves measure approximately 1 to 3 inches long and 1 to 2 inches wide, with narrow lobes giving the foliage a finely textured appearance. From mid-spring through summer and often into early fall, it produces rounded clusters of small, tubular flowers, each individual bloom measuring about ½ inch across, while the full flower heads span 1½ to 3 inches in diameter. The blossoms are typically vivid shades of purple, violet, or lavender with a lighter central eye. Its fibrous root system usually penetrates 8 to 18 inches deep, contributing to its notable drought tolerance once established. This compact yet spreading growth habit makes prairie verbena especially well suited for rock gardens, borders, native plantings, and erosion control in sunny, well-drained sites.