Leaves 20-50(-60), mid cauline usually 40-50 mm. Phyllaries attenuate. 2n = 18.

Flowering Aug-Oct. Sandy and rocky soils, edges of deciduous and pine woods, clearings, sandy and rocky margins of ponds and streams, balds, roadsides; 0-1600+ m; N.B., N.S., Ont., Que.; Ala. , Conn., Del., Ga., Ky., Maine, Md., Mass., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., W.Va.