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CCDB → Angiosperms → Onagraceae → Ludwigia → Ludwigia simpsonii Chapm.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Ludwigia simpsonii Chapm. | Ludwigia simpsonii Chapm. | 24 | IPCN online | Peng, C. i. 1988. The biosystematics of Ludwigia sect. Microcarpium (Onagraceae). Ann. Missouri Bot. Gard. 75(3): 970–1009. | |||
| ! | Ludwigia simpsonii Chapm. | Ludwigia simpsonii Chapm. | 48 | Fedorov, 1974 | Gregory D. P., Klein 1960 |