Ann. Bot. Fennici 58: 139–169 ISSN 0003-3847 (print) ISSN 1797-2442 (online) Helsinki 5 March 2021 © Finnish Zoological and Botanical Publishing Board Catalogue and typifications of new taxa of vascular plants described by Mårten Magnus Wilhelm Brenner (1843–1930) Henry Väre Finnish Museum of Natural History, Botanical Museum, P.O. Box 7, FI-00014 University of Helsinki, Finland (e-mail:
[email protected]) Received 20 Oct. 2020, final version received 18 Feb. 2021, accepted 18 Feb. 2021 Väre H. 2021: Catalogue and typifications of new taxa of vascular plants described by Mårten Magnus Wilhelm Brenner (1843–1930). — Ann. Bot. Fennici 58: 139–169. Mårten Magnus Wilhelm Brenner (1843–1930) was a non-professional Finnish botanist who published 220 articles or notes. Brenner worked on East Fennoscandian vascular plants (the territory of present-day Finland and adjacent Russia). He validly published ca. 833 new taxa, especially in genus Hieracium (including Pilosella), and introduced 56 names as nomina nuda. Brenner had no concept of type specimens and therefore all his plant taxa need typification, and 151 of those are lectotypified here. In this paper,nomina nuda and the taxa whose type material was not found are also listed, except those of the apomictic genera Hieracium and Taraxacum. Many of Brenner’s new taxa are forms and varieties, generally not recognised nowadays. Many of his taxa were based on single or few specimens and therefore were characterised by local distributions, whereas some include ample original material. Finnish botanists generally ignored Brenner’s contribu- tions to taxonomy. However, 11 species of Hieracium, 20 of Taraxacum and Euphrasia stricta var.