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Tetsuo Michael Koyama (1933–2024) was a Japanese botanist and collector. Throughout his career, he was active in Japan, Brazil, Venezuela, Argentina and the United States.

This botanist is denoted by the author abbreviation T.Koyama when citing a botanical name.

References

1. "Koyama, Tetsuo Michael". Tropicos. Missouri Botanical Garden. Retrieved 3 August 2023.
2. Brummitt, R K; Powell, C E (1992). Authors of Plant Names. Royal Botanic Gardens, Kew. ISBN 1-84246-085-4.
3. "Koyama, Tetsuo Michael (1933-)". International Plant Names Index. Retrieved 3 August 2023.

• 1933 births
• 21st-century Japanese botanists