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CCDB → Angiosperms → Boraginaceae → Hydrophyllum → Hydrophyllum capitatum Douglas ex Benth.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Hydrophyllum capitatum Douglas ex Benth. | Hydrophyllum capitatum Douglas ex Benth. | 9 | IPCN online | Henderson, D. M., J. Jenson & J. LYON. 1975. In IOPB chromosome number reports XLVIII. Taxon 24: 367–372. | |||
| Hydrophyllum capitatum var. capitatum | Hydrophyllum capitatum Douglas ex Benth. | 9 | IPCN online | Beckmann, R. L. 1979. Biosystematics of the genus Hydrophyllum L. (Hydrophyllaceae). Amer. J. Bot. 66: 1053–1061. | |||
| ! | Hydrophyllum capitatum Douglas ex Benth. | Hydrophyllum capitatum Douglas ex Benth. | 9 | IPCN75-78 | Henderson et al. 1975 | ||
| ! | Hydrophyllum capitatum Douglas ex Benth. | Hydrophyllum capitatum Douglas ex Benth. | 18 | Fedorov, 1974 | Constance 1963 | ||
| ! | Hydrophyllum capitatum Douglas ex Benth. | Hydrophyllum capitatum Douglas ex Benth. | 18 | Darlington, 1955 | Cave & C. 1942 |