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CCDB → Angiosperms → Apocynaceae → Trichocaulon → Trichocaulon annulatum N. E. Br.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Trichocaulon annulatum N. E. Br. | Trichocaulon annulatum N. E. Br. | 22 | IPCN online | Nakamura, T. 1991. A study of geographical differentiation and chromosome of succulent plants in the family Asclepiadaceae. Kromosomo 61: 2068–2077. | ||
| ! | Trichocaulon annulatum N. E. Br. | Trichocaulon annulatum N. E. Br. | 22 | IPCN online | Albers, F. 1977. In IOPB chromosome number reports LVIII. Taxon 26: 557–565. |