Oak savannas and borders; thickets, banks, and clearings; meadows and barrens, borders of fens, thin soil over limestone.

The broad appressed bracts in the inflorescence are suggestive of Prunella vulgaris, which (besides having 4 stamens) tends to have longer petioles and the upper lip of the calyx only shallowly 3-toothed instead of cleft into long copiously ciliate teeth.