| | 1. Leaflets sparsely hairy above; central leaflet acute to obtuse, teeth generally 12–21, sharp or obtuse, central tooth < to > adjacent ones; bractlets often 2-lobed — inflorescence often > leaves; < 2000 m |
| F. vesca |
| | 1' Leaflets generally glabrous above; central leaflet rounded to truncate, teeth generally < 13, ± obtuse, central tooth << adjacent ones; bractlets unlobed |
| |
| | 2. Leaf leathery, central leaflet stalk 1–10 mm; petals (8)10–18 mm; inflorescence < or > leaves; ± coastal, < 200 m |
| F. chiloensis |
| | 2' Leaf thin, central leaflet stalk 1–3 mm; petals 4–9 mm; inflorescence < leaves; mtns, generally 1200–3300 m |
| F. virginiana
|