| | 1. Leaves ± sagittate or hastate, entire to coarsely dentate |
| |
| | 2. Leaves thinly hairy; phyllaries loosely soft-hairy |
| B. deltoidea |
| | 2' Leaves densely canescent-tomentose, at least when young; phyllary bases permanently tomentose |
| B. sagittata |
| | 1' Leaves not sagittate or hastate, coarsely toothed to compound |
| |
| | 3. Leaves coarsely serrate but generally not deeply lobed |
| B. serrata |
| | 3' Leaves generally deeply lobed to compound |
| |
| | 4. Stems densely glandular (and generally also nonglandular) |
| B. hirsuta |
| | 4' Stems strigose to densely tomentose |
| |
| | 5. Outer phyllaries lanceolate, 2–4 mm wide, acuminate; herbage densely tomentose |
| B. hookeri var. lanata |
| | 5' Outer phyllaries ovate-lanceolate, generally > 5 mm wide; herbage finely strigose, green to densely silvery-canescent |
| |
| | 6. Outer phyllaries 20–40 mm, >> disk; leaves thinly strigose, green or lightly canescent |
| B. macrolepis var. macrolepis |
| | 6' Outer phyllaries 13–24 mm, generally = or slightly > disk; leaves generally densely strigose, lightly canescent to silvery |
| |
| | 7. Leaves gray (generally not silvery), lobes generally again divided; eastern Cascade Range, Modoc Plateau |
| B. macrolepis var. platylepis |
| | 7' Leaves silvery, lobes generally entire; e Klamath Ranges |
| B. sericea
|