Pycnanthemum flexuosum Britton, Sterns & Poggenb.

Stems to 1+ m, commonly with short, leafy axillary branches, minutely puberulent; lvs narrowly oblong or lance-oblong, entire or with a few low callous teeth, finely hairy on the veins beneath, the main ones 2–4 cm, ca a fourth as wide; lateral veins 3–4 pairs, obscure; heads as in no. 3 [Pycnanthemum setosum Nutt.], but the cal 6–10 mm, its lower teeth 2.5–5 mm; 2n=36. Dry woods and barrens, chiefly in sandy soil on the coastal plain; se. Va. to Fla. (P. hyssopifolium)

Upland prairies, pastures, meadows, open woodland and roadsides.

Can be grown by seedlings.