Abstract
Based on molecular and morphological evidence, two species of Seseli sect. Eriocycla subsect. Cordata are described as a new genus, Shomalia. The new genus is related to the Iranian endemic genus Azilia; the taxa have the following common diagnostic features: similar plant architecture, imparipinnate leaves, leaf segments ovate or orbiculate, with obtuse or cuneate basis and dentate or dissected margin coming down over abaxial surface, up to five linear bracts present, and late blooming and fruiting. At the same time, Shomalia, gen. nov. differs from Azilia in carpological features: it has elongated or lanceolate mericarps, terete in cross-section, covered with non-branching simple hairs or glabrous (vs. elliptic glabrous mericarps strongly compressed from the dorsal side in Azilia), morphology of the underground part (multi-branched woody rootstock vs. thickened and non-branching rootstock), and number of stems (numerous vs. solitary).
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All molecular data generated and analysed during the current study are available in Genbank https://www.ncbi.nlm.nih.gov/genbank/.
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Acknowledgements
We thank the curators and staff of B, MW, P, TARI, and W herbaria. We also thank Anna Mikhlina for making the illustrations. This study was supported by the Russian Foundation for Basic Research and Iran National Science Foundation, Project Number 20-54-56017. SEM studies were performed at the User Facilities Centre of Lomonosov Moscow State University with the financial support of the Ministry of Education and Science of the Russian Federation.
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Online Resource 1. List of plant material used in molecular part of the study.
Online Resource 2. Bayesian phylogenetic tree of nrITS nucleotide sequences with posterior probabilities.
Online Resource 3. Bayesian phylogenetic tree of nrETS nucleotide sequences with posterior probabilities.
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Lyskov, D., Degtjareva, G., Zarre, S. et al. Neither Seseli nor Eriocycla: a new Iranian relict genus Shomalia (Apiaceae), related to Azilia. Plant Syst Evol 308, 21 (2022). https://doi.org/10.1007/s00606-022-01813-3
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DOI: https://doi.org/10.1007/s00606-022-01813-3