| Name | Koyama, Tetsuo Michael | 
| Date of birth | 1933 | 
| Date of death | 2024 | 
| Remarks | [author note: Cyperaceae: Smilacaceae] [collector note: CAS, NY, TI, TNS] Example of Name Published: Carex pisanensis T.Koyama, Acta Phytotax. Geobot. 15(4): 112 (1954) | 
| ASA Botanist ID | 101199 botanist | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/5ebbaacf-be2a-4bc7-a953-25757a051bf1 | 
| Variant name | Tetsuo Michael Koyama | 
| Variant name | Koyama, Tetsuo | 
| Author name | T. Koyama | 
| B & P Author Abbrev. | T.Koyama | 
| Standard/Label Name | T. M. Koyama | 
| Full Name | Koyama, Tetsuo Michael | 
| Geography Author | Japan,  United States of America | 
| Geography Collector | Brazil,  Japan,  United States of America | 
| Specialty Author | Pteridophytes | 
| Specialty Author | Spermatophytes | 
| Citation as Collector | Walker, E. J. 1976. Fl. Okinawa S. Ryukyu I. ; J. Jap. Bot. 30: 129. 1955 | 
| Citation as Author | Authors of Plant Names. Royal Botanic Gardens, Kew ; Death year from: Kazumi Fujikawa (Makino Botanical Garden) & David E. Boufford (GH) | 
| Member of teams/groups |  | 
| Author in | Grasses Japan | 
| Holdings | Search for specimens collected by T. M. Koyama | 
| Collections in | 1948 (1),  1949 (2),  1951 (2),  1952 (5),  1953 (2),  1955 (2),  1956 (5),  1957 (1),  1958 (3),  1959 (5),  1961 (1),  1968 (2),  1971 (4) | 
| Collector Teams: | T. M. Koyama & G. Hatschbach  T. M. Koyama & E. de Lima  T. M. Koyama, Itaru & J. Ohwi  T. M. Koyama & G. Agostini  T. M. Koyama, V. Koyama, G. Hatschbach & E. de Lima  G. Agostini & T. M. Koyama  J. Ohwi & T. M. Koyama  T. Koyama & Guaglianone  T. M. Koyama, C. C. Hsu & C. M. Lü  T. M. Koyama & J. Ohwi  T. M. Koyama & M. T. Kao | 
| Author Teams: | Ohwi & T. Koyama  T. Koyama & Guaglianone  H. Hara & T. M. Koyama |