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CCDB → Angiosperms → Onagraceae → Calylophus → Calylophus toumeyi (Small) Towner
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Oenothera hartwegii var. toumeyi (Small) Munz | Calylophus toumeyi (Small) Towner | 7 | Cave1958 | Lewis et al. 1958 |