| united states | arizona | layia glandulosa | species | 1 | 0 |
| united states | california | layia carnosa | species | 1 | 0 |
| united states | california | layia chrysanthemoides | species | 2 | 0 |
| united states | california | layia discoidea | species | 6 | 0 |
| united states | california | layia gaillardioides | species | 1 | 0 |
| united states | california | layia glandulosa | species | 30 | 0 |
| united states | california | layia heterotricha | species | 1 | 0 |
| united states | california | layia pentachaeta subsp. albida | subspecies | 1 | 0 |
| united states | california | layia pentachaeta subsp. pentachaeta | subspecies | 2 | 0 |
| united states | california | layia septentrionalis | species | 3 | 0 |
| united states | washington | layia glandulosa | species | 1 | 0 |