From Flora of Indiana (1940) by Charles C. Deam
Frequent throughout the state in low places in woods, wet borders of lakes, ditches along roadsides and railroads, and sometimes in fallow fields.
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 נ1-4 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.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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