Key to Wisconsin Polanisia

Author: Theodore S. Cochrane

• 1a.Leaflets linear or linear-elliptic, 1–3 mm wide; bracts 3-foliolate; fruits 2–4 mm wide, the style persistent, 0.6–1.3 mm long P. jamesii

• 1b.Leaflets elliptic or narrowly elliptic to obovate or oblanceolate, 4–20 mm wide; bracts (except occasionally the lowest) 1-foliolate; fruits 5–9 mm wide, the style deciduous, 0.8–2.9 (–3.5) mm long P. dodecandra