| | 1. Fruit ± flat parallel to septum, elliptic to obovate |
| L. occidentalis subsp. occidentalis |
| | 1' Fruit plump or ± flat parallel or perpendicular to septum, elliptic to obcordate or round |
| |
| | 2. Annual; basal rosette 0; caudex 0 |
| L. tenella |
| | 2' Perennial; basal rosette present; caudex present |
| L. kingii |
| | 3. Fruit obovate to obcordate, often ± flat perpendicular to septum, sessile or short-stalked above receptacle, top truncate or shallowly notched; valves generally hairy inside; seeds 2–4 per chamber; petals 5.5–9.5 mm |
| subsp. kingii |
| | 3' Fruit ± round or elliptic to obovate, plump or ± flat parallel to septum, often short-stalked above receptacle, top obtuse; valves generally glabrous inside; seeds 2–8 per chamber; petals 9–13 mm |
| |
| | 4. Style 6–9 mm, slender; seeds 2–4 per chamber; plant erect; fruit ± round; San Bernardino Mountains |
| subsp. bernardina |
| | 4' Style 2–6 mm, stout; seeds 4–8 per chamber; plant prostrate to erect; fruit ± round or elliptic to obovate; Desert Mountains |
| subsp. latifolia
|