| Name | Theissen, Ferdinand |
| Date of birth | 1877 |
| Date of death | 1919 |
| Remarks | [author note: Herbarium and types: FH; additional material at B (mostly destroyed), W; exsiccatae: Decades Fungorum Brasiliensium at B (mostly destroyed), BPI, FH, HBG, K, LIL, S, SOLH] [collector note: B (r. 1911), FH, IACM] |
| ASA Botanist ID | 102726 botanist |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/8f7cd24b-dd5a-4815-b8dc-9c432daf8d7b |
| Variant name | Ferdinand Theissen; Theiszen |
| Author name | Theissen |
| B & P Author Abbrev. | Theiss. |
| Standard/Label Name | F. Theissen |
| Full Name | Theissen, Ferdinand |
| Geography Author | Germany |
| Geography Collector | Brazil |
| Specialty Author | Fungi and Lichens |
| Specialty Author | Spermatophytes |
| Specialty Collector | Fungi |
| Citation as Author | Authors of Plant Names. Royal Botanic Gardens, Kew |
| Citation as Author | Taxonomic Literature. Second Edition. Utrecht |
| Citation as Collector | Index Herbariorum - Collectors T-Z |
| Member of teams/groups | |
| Author in | Dec. Fungorum Brasil. |
| Holdings | Search for specimens collected by F. Theissen |
| Collections in | [no date] (11), 1884 (1), 1899 (1), 1904 (2), 1906 (1), 1907 (2), 1908 (1), 1936 (1) |
| Collector Teams: | F. Theissen & H. Sydow |
| Author Teams: | Theissen & Sydow |