Morphologically intermediate between the parental species. Stem slender, slightly ridged, subglabrous, branching above or simple. Leaves lanceolate to oblanceolate, pinnatifid, the primary lobes lanceolate to cuneate, usually with opposite cuneate to lanceolate secondary lobes, all with short, firm spines, the pubescence beneath sparsely cobwebby, sub-glabrous above. Heads lavender, intermediate between the parental colors. Involucre 22- 27 mm high, the outer bracts glutinous, short, obtuse, terminated by spines only 1.2-1. 5 mm long, the inner ones elongate-acuminate. Achenes brown, 4-4.5 mm long
Johnson, M.E. and H.H. Iltis. 1963. Preliminary reports on the flora of Wisconsin: No. 48. Compositae Family. Wisconsin Academy of Sciences, Arts & Letters. 52:255-342.