Side-flowering Skullcap

Scutellaria lateriflora, (commonly "blue skullcap", "mad dog skullcap", "American skullcap", "side-flowering skullcap", etc.) is a hardy perennial herb of the mint family, Lamiaceae, native to North America.

It has an upright habit, growing 60–80 cm (24–31 inches) in maximum height. It is a wetland-loving species and grows near marshes, meadows, and other wet habitats. The blue flowers are just under 1 cm (0.4 inches) long. Most of the flowers do not appear at the top of the main stem but are produced along the length of side branches that grow from the leaf axils.

Other skullcaps (Scutellaria) species include common skullcap (S. galericulata), western skullcap (S. canescens), and southern skullcap (S. cordifolia).