Family, Figwort. Color, light blue. Calyx, 5-parted. Corolla, 2-lipped, with a small, thread-like spur growing from the lower lip. Upper leaves, bract-like; lower, linear, entire; root-leaves somewhat cut into linear divisions. Flowers, in terminal racemes on slender stems, unbranched, 1 to 2 feet high. A rosette of dissected leaves is often found growing at the base of the stem. May to September.

Blue toadflax (Linaria canadensis)

Blue toadflax (Linaria canadensis)

A weed in cultivated grounds, in sandy, dry soil, rather persistent. Atlantic and Gulf States.