| |
| DATURA |
| | 2' Fruit wall not prickly |
| |
| | 3. Calyx lobes > tube, wing-like at base in fruit |
| NICANDRA (no key) |
| | 3' Calyx lobes < or, if > tube, not wing-like at base in fruit |
| |
| | 4. Corolla narrowly urn-shaped; seeds flat, narrowly winged |
| ORYCTES (no key) |
| | 4' Corolla funnel-shaped; seeds angled but not flat, not winged |
| |
| | 5. Flowers in racemes or panicles (only lower bracts leaf-like) |
| NICOTIANA |
| | 5' Flowers solitary in axils of leaves or leaf-like bracts |
| PETUNIA (no key) |
| |
| | 6. Corolla salverform to funnel-shaped (urn-shaped in Salpichroa) |
| |
| LYCIUM |
| | 7' Perennial or shrub, unarmed |
| |
| | 8. Erect shrub; corolla narrowly funnel-shaped, red |
| CESTRUM (no key) |
| | 8' Decumbent or climbing per; corolla urn-shaped, white or greenish |
| SALPICHROA (no key) |
| | 6' Corolla ± rotate to shallowly bell-shaped |
| |
| | 9. Anthers opening by pores or short slits near tip |
| SOLANUM |
| | 9' Anthers opening by slits from tip to near base |
| |
| | 10. Anthers generally > filaments |
| |
| | 11. Anthers adherent; leaves ± odd-1–2-pinnate |
| LYCOPERSICON |
| | 11' Anthers free; leaves entire to deeply lobed |
| SOLANUM |
| | 10' Anthers generally < filaments |
| |
| | 12. Calyx in fruit not bladder-like; corolla tube tomentose between filament bases |
| CHAMAESARACHA |
| | 12' Calyx in fruit bladder-like; corolla tube hairy but not tomentose between filament bases |
| PHYSALIS
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