Lvs numerous, to 2 dm (petiole included), cleft to the base into 3 divisions, each of these 3-pinnate, the ultimate segments linear, 2–5 mm; scape 1–2.5 dm; bractlets united to or beyond the middle; pet yellow; fr 6–9 mm; 2n=22. Prairies and plains; Man., Mo., and Tex. to Mont., Ida., and Ariz. barely entering our range in Io. and Mo. Apr. Var. foeniculaceum, mainly of the n. Great Plains, has evidently pubescent herbage, ovaries, and frs, or the frs are sometimes glabrous at maturity. Var. daucifolium (Torr. & A. Gray) Cronquist, mainly of the s. Great Plains, has scantily pubescent or glabrate herbage, and glabrous ovaries and frs.
Dry open slopes, valleys, plains and at moderate elevations. Prairies in calcareous clay soils in Texas.
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