Stems erect, 5–10 dm, conspicuously hirsute on the angles with deflexed bristles to 2 mm; petioles to 1 cm, or none; lvs narrowly oblong or lanceolate, 4–12 × 1–4 cm, acuminate, serrate, usually distinctly hairy above; bracts long-ciliate and denticulate; cal-tube hirsute, rarely also minutely hairy, 3.3–4.7 mm, the lobes narrowly lanceolate to almost linear, at least three-fourths as long, hirsute or ciliate. Wet soil; Mass. and Vt. to Ont. and Man., s. to Md., Ky., and Ark. July, Aug. (S. tenuifolia var. h.)
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