| 417200 - Thesium alpinum L. | 
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| 417300 - Thesium bavarum Schrank | 
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| 417400 - Thesium divaricatum Mert. & W. D. J. Koch | |
| 417500 - Thesium humifusum DC. | 
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| 417600 - Thesium linophyllon L. | 
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| 417700 - Thesium pyrenaicum Pourr. | 
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| 417800 - Thesium rostratum Mert. & W. D. J. Koch | 
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