Russian Academy of Sciences, Far Eastern Branch Botanical Garden-Institute botanica pacifica A journal of plant science and conservation Volume 9, No. 1 2020 VLADIVOSTOK 2020 Botanica Pacifica. A journal of plant science and conservation. 2020. 9(1): 3–52 DOI: 10.17581/bp.2020.09113 Revision of the genus Viola L. (Violaceae) in the Russian Far East with notes on adjacent territories Marc Espeut Marc Espeut ABSTRACT e-mail:
[email protected] This study proposes a revision of the genus Viola L. (Violaceae) in the Russian 34, rue de l'Agriculture, 66500 Prades, Far East and adjacent regions. It is based on the taxonomic work that Becker con- France ducted on the Asian Viola (1915–1928), but also on Clausen's cytotaxonomic stud- ies (1926–1964) that laid the foundations of the genus' phylogeny. Chromosome counts, as well as phylogenetic analyses, have allowed to specify the infrageneric taxonomy and establish relationships between some taxa of American or Asian ad- Manuscript received: 09.03.2020 jacent territories. A systematic treatment based on the Biological Species Concept, Review completed: 22.04.2020 associated with genetic, cytotaxonomic, and biogeographic data, allowed many sys- Accepted for publication: 02.05.2020 tematic and nomenclatural changes, at different levels: infrageneric, specific and Published online: 07.05.2020 infraspecific. This study shows the remarkable role of the Russian Far East for the conservation and differentiation of the genus Viola species, and probably for the whole flora of the Holarctic Kingdom. Keywords: Violaceae, Viola, Russian Far East, typifications, taxonomic novelties, no- TABLE OF CONTENTS menclatural novelties Introduction ..........................................................