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Taxonomic distribution of amphicarpic species (see complete list in Table S1)
| Families | No. genera | No. species |
|---|---|---|
| Asteraceae | 2 | 2 |
| Brassicaceae | 2 | 2 |
| Commelinaceae | 3 | 6 |
| Cyperaceae | 1 | 1 |
| Fabaceae | 15 | 31 |
| Gentianaceae | 1 | 1 |
| Hydrocharitaceae | 2 | 3 |
| Poaceae | 6 | 11 |
| Polygalaceae | 1 | 3 |
| Polygonaceae | 3 | 4 |
| Scrophulariaceae | 1 | 1 |
| Urticaceae | 1 | 1 |
| Violaceae | 1 | 1 |
| Total | 39 | 67 |
