| | 1. Leaf ± 3-pinnate, segments deeply pinnately lobed |
| D. expansa |
| | 1' Leaf 1–2-pinnate, segments deeply pinnately lobed or not |
| |
| | 2. Longest 1° leaflets near base; veins running to teeth tips; locally common, Northwestern California, Sierra Nevada, Central Western California, Southwestern California |
| D. arguta |
| | 2' Longest 1° leaflets near middle, rarely near base; veins generally ending short of margin; San Bernardino Mountains, White and Inyo Mountains |
| D. filix-mas
|