Green, coarsely toothed leaves that when crushed smell like mushrooms. Stems are erect, square and often purplish. Small, five-lobed blue purple flowers bloom on dense spikes. Flowers begin at the bottom of the spike and gradually open upward. Spreads readily by seed in wet years.
Starts from seed, container.
Prairies, meadows, stream banks, and roadsides.
A snuff made from dried flowers was used to treat nose bleeds.