Stems erect, stiff, four-sided and usually branched, roughish pubescent, 2 to 7 feet tall from a perennial root. Leaves oblong-lanceolate to lanceolate, pointed at the apex, sharply toothed, 3 to 6 inches long, the lower leaves sometimes hastately three-lobed at the base, the others blunt or abruptly tapering to the petiole. Flowers blue, numerous in slender-panicled spikes, 2 to 6 inches long. Calyx tubular, somewhat unequally five-toothed; corolla about one-eighth of an inch broad, the limb five-lobed and very slightly two-lipped, dark blue, varying sometimes to pink or rarely white.
In moist places, fields, meadows and roadsides, Nova Scotia to British Columbia, south to Florida and Arizona. Flowering from June to September.
Memoir 15 N. Y. State Museum
B. Blue Or False Vervain - Verbena hastata