annual, sparsely hispid or glabrescent; stem erect, branching, angular; leaves half-clasping at base, bipinnatipartite, shortly petioled, the lobes narrow-linear, with revolute margins, elongate, some simple, some laxly pinnulated, all callous-tipped; infl. subsimple, the pedicels terminal, elongated, slender, pubescent; inv. of 12–13 acute, scabro-pubescent scales, nude or scarcely calycled; fl. 40–50; rays several, purple! (or “pale” DC.;) achenes striate, downy. 6–12 inches high, much branched. Leaves 1 1/2–2 inches long, the lowermost bipinnate, the upper varying to pinnate; lobes 1/2 line wide, tipped with a remarkable callus. Rays in an original specimen, in Hb. Sd., marked by De Candolle, distinctly purple; in another in Hb. Cap., as clearly pale, and probably faded; or does it vary with purple and yellow rays? In other respects the specimens are identical.
