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- Included species (for ITIS, ):
- T. borealis, T. europaea, T. latifolia
- Included species (for NCBI, ):
- T. borealis, T. europaea
- Included species (for The Plant List, ):
- T. arctica, T. borealis, T. latifolia
- Note: only species listed as 'Accepted'
This category has the following 2 subcategories, out of 2 total.