| Parent | Category | Figures | |
|---|---|---|---|
| 1 | Horkelia | californica | 70 |
| 2 | Horkelia | cuneata | 58 |
| 3 | Horkelia | fusca | 49 |
| 4 | Horkelia | marinensis | 41 |
| 5 | Horkelia | clevelandii | 31 |
| 6 | Horkelia | tridentata | 19 |
| 7 | Horkelia | rydbergii | 16 |
| 8 | Horkelia | bolanderi | 5 |
| 9 | Horkelia | tenuiloba | 3 |
| 10 | Horkelia | truncata | 3 |
| 11 | Horkelia | wilderae | 2 |
| 12 | Horkelia | hispidula | 2 |
| 13 | Horkelia | parryi | 2 |
| 14 | Horkelia | sericata | 1 |
| 15 | Horkelia | tularensis | 1 |
| 16 | Horkelia | howellii | 1 |