| 1 | Leaves and stems shortly tomentose with stellate hairs |
| 1' | Leaves and stems subglabrous or thinly pilose with simple glandular or eglandular hairs |
| 2 | Basal leaves conspicuously sinuate-lobed; filaments with purple wool; capsule c. 4 x 3.5 mm |
| 2' | Basal leaves not sinuate-lobed, obtusely crenate; filaments with whitish-yellow wool; capsule 5-6 x 4-5 mm |
| 3 | Flowers very shortly pedicellate or subsessile; annual with the cauline leaves pinnatisect or bipinnatisect into narrow lobes |
| 3' | Flowers distinctly pedicellate; biennials or perennials; cauline leaves not as above |
| 4 | Basal leaves crenate or shortly sinuate-lobed; cauline alternate; stem sparsely glandular above, glabrous towards base; stamens 5 |
| 4' | Basal leaves lyrate-pinnatisect; cauline opposite; stems generally glandular-pilose throughout; stamens 4 |
