Stems to 1+ m, commonly with some sterile axillary branches, minutely puberulent; lvs ovate to lance-ovate or oblong, subsessile or on petioles to 3 mm, obtuse or acute, entire or with a few obscure teeth, broadly rounded to truncate at base, the main ones 3–6 cm, a third to half as wide, glabrous, the uppermost ones minutely canescent; lateral veins 5–7 pairs; heads few, dense, 15–25 mm wide; bracts lanceolate, long-acuminate, with prominent midvein, minutely puberulent; cal minutely puberulent, its nerves evident, its teeth 1.5–2.5 mm, attenuate to aristate, 2n=76. Dry fields and upland woods on the coastal plain; N.J. to Ga. (P. aristatum; P. umbratile) Putative hybrids with nos. 4 [Pycnanthemum incanum (L.) Michx.] or 6 [Pycnanthemum pycnanthemoides (Leavenw.) Fernald] have been called P. ×monotrichum Fernald.
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