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| Hypericum humifusum L. | Wentworth, J. E., J. P. Bailey & R. J. Gornall. 1991. Contributions to a cytological catalogue of the British and Irish flora, 1. Watsonia 18: 415–417. | 90-91 | | 16 |
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| Hypericum humifusum L. | Králik, E. 1986. Karyological study of the Slovak flora XVI. Acta Fac. Rerum Nat. Univ. Comenianae, Bot. 33: 77–80. | 92-93 | | 16 |
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| Hypericum humifusum L. | Murin, A. 1976. In: Index of chromosome numbers of Slovian flora. Part 4. Acta Fac. Rerum Nat. Univ. Comenianae, Bot. 25: 1–18. | | | 16 |
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| Hypericum humifusum L. | Jav|0urková-Jarolímová, V. 1992. In J. M|3esí|3ccek & V. Jav@0urková-Jarolímová, List of Chromosome Numbers of the Czech Vascular Plants. Academia, Praha. | 96-97 | | 16 |
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| Hypericum humifusum L. | Lövkvist, B. & U. M. Hultgård. 1999. Chromosome numbers in south Swedish vascular plants. Opera Bot. 137: 1–42. | 98-00 | | 16 |
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| Hypericum humifusum L. | LOON VAN, J. C. & H. D. JONG. 1978. In IOPB chromosome number reports LIX. Taxon 27: 53–61. | | | 16 |
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