| 1. Stigma of ray flower dark red; upper leaves 13-lobed |
| B. bakeri |
| 1' Stigma of ray flower yellow; most leaves with 315 pinnate lobes |
| B. nanum |
| 2. Pollen generally white; fruit < 3 mm; disk flowers 2070; generally inland |
| var. nanum |
| 2' Pollen yellow; fruit > 3 mm; disk flowers 60100; coastal |
| var. robustum
|