an erect villous branched annual herb 1–1 1/2 ft. high; leaves usually shortly petiolate, oblong-lanceolate, ovate-lanceolate or ovate, 3/4–2 in. long, 1/3–1 in. broad or more, broadly crenate-serrate from the middle to the apex, shortly and densely pilose on both sides; whorls densely many-flowered, in usually a solitary globose head 3/4–1 in. in diam. in the axils of the upper leaves; bracts narrowly linear, pilose, somewhat shorter than the calyx; calyx 3–3 1/4 lin. long in flower, about 7 lin. long and somewhat inflated in fruit, 5-toothed; teeth deltoid or subulate, 1–1 1/2 lin. long, spinescent; corolla very pale mauve, about as long as the calyx. null