Iris sanguinea is conspecific with I. sibirica (Iridaceae) according to morphology and plastid DNA sequence data

A taxonomic revision of Iris subser. Sibiricae is provided based on morphological and molecular analyses and the study of protologues and original material. Two to three species have been recognized in this subseries by botanists. To address the question of species delimitations and relationships wi...

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Published in:PeerJ (San Francisco, CA) CA), 2020-10, Vol.8, p.e10088-e10088, Article e10088
Main Authors: Boltenkov, Eugeny, Artyukova, Elena, Kozyrenko, Marina, Erst, Andrey, Trias-Blasi, Anna
Format: Article
Language:English
Subjects:
Analysis
Chloroplast DNA
Deoxyribonucleic acid
DNA
DNA sequencing
Flowers & plants
Geographical distribution
Iridaceae
Iris subser. Sibiricae
Molecular Biology
Molecular phylogeny
Morphology
Nomenclature
Nucleotide sequence
Phylogenetics
Plant Science
Ribosomal DNA
Species
Synonymy
Taxonomic revision
Taxonomy
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Summary:A taxonomic revision of Iris subser. Sibiricae is provided based on morphological and molecular analyses and the study of protologues and original material. Two to three species have been recognized in this subseries by botanists. To address the question of species delimitations and relationships within this group, we analyzed four non-coding regions of plastid DNA (trnS-trnG, trnL-trnF, rps4-trnS.sup.GGA , and psbA-trnH) for samples from 26 localities across the distribution ranges of two currently recognized species, I. sanguinea and I. sibirica. Variance analysis, based on nine characters, revealed no separation between taxa. Moreover, no morphological character could be used to define clear boundaries between taxa. Our results strongly support that I. subser. Sibiricae is monotypic and comprises only I. sibirica, instead of two or three species. Iris sibirica is morphologically variable and one of the most widespread Eurasian species of Iridaceae. Previously accepted taxa, I. sanguinea and I. typhifolia, are synonymised with I. sibirica and also two names, I. orientalis and I. sibirica var. haematophylla, which are typified here, are placed in the synonymy of I. sibirica. Information on the distribution of I. sibirica and the main features used to distinguish between I. sibirica and I. subser. Chrysographes species are provided.
ISSN:2167-8359
2167-8359
DOI:10.7717/peerj.10088