Stems erect, 5–10 dm. Principal leaves 3–6 cm; leaflets (5 or)7(or 9), blades (12–)15–35 mm. Spikes densely flowered, (6–)6.5–9.5(–10) mm diam.; axis not visible, (1–)1.5–5.5(–7) cm; bracts 3–5.5 mm. Calyces: tube glabrous, with 1 small gland between ribs. Epistemonous petals: blades 2–2.9 × 1.3–1.7 mm. 2n = 14.

Phenology: Flowering late spring–summer(–fall).
Habitat: Prairies, roadsides.
Elevation: 0–1100 m.

Distribution

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Man., Ont., Sask., Ala., Ark., Ga., Ill., Ind., Iowa, Kans., Ky., La., Minn., Miss., Mo., Nebr., N.Dak., Okla., S.C., S.Dak., Tenn., Tex., W.Va., Wis.

Discussion

In Texas, var. candida is known from the eastern half of the state.

Selected References

None.

Lower Taxa

None.