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CCDB → Angiosperms → Compositae → Xanthisma → Haplopappus rhizomatus M. C. Johnst.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Haplopappus rhizomatus M. C. Johnst. | Xanthisma rhizomatum (M. C. Johnst.) D. R. Morgan & R. L. Hartm. | 8 | Fedorov, 1974 | Johnston 1961 |