| | 1. Leaves basal and cauline; stem 50–160 cm; corolla shed after pollination; flower erect |
| |
| | 2. Petals yellow, 12–16 mm, outer recurved to middle |
| D. chrysantha |
| | 2' Petals whitish to cream, 20–25 mm, outer recurved at tips |
| D. ochroleuca |
| | 1' Leaves basal; stem < 45 cm; corolla persistent after pollination; flower nodding |
| |
| | 3. Inflorescence 4±flowered; inner petals conspicuously crested; plant rhizomed |
| |
| | 4. Base of central stamen of each set aligned with lateral 2; Northwestern California, Cascade Range, High Sierra Nevada, n Central Western California; < 2200 m |
| D. formosa |
| | 4' Base of central stamen of each set bulging out from lateral 2; s High Sierra Nevada; 2200–3000 m |
| D. nevadensis |
| | 3' Inflorescence 1–3-flowered; inner petals not or obscurely crested; plant tubered |
| |
| | 5. Recurved tips of outer petals < bodies; inflorescence 1–3-flowered |
| D. pauciflora |
| | 5' Recurved tips of outer petals > bodies; inflorescence 1-flowered |
| D. uniflora
|