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A Checklist with Three New Species and Two New Country Records of Begonia from Dibang Valley, Arunachal Pradesh, India

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Abstract

A synoptical treatment of the Begonia flora of the Dibang Valley in eastern Arunachal Pradesh, India is provided, along with the descriptions of three new species. In total, eight species of Begonia are recognized as occurring in the area, of which B. atrofusca, B. lorentzonii and B. rushforthii are new to science, while B. acetosella var. hirtifolia and and B. pseudoheydei are new records for India. A phylogenetic analysis of molecular data was performed to clarify the affinities of the treated species within the genus. Three chloroplast regions (rpl32-trnL spacer, ndhA intron and ndhF-rpl32 spacer) were sequenced and used to build a maximum likelihood phylogeny revealing that the Dibang taxa belong to two main groups of B. sect. Platycentrum.

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Data Availability

All newly generated sequences are available from https://www.ncbi.nlm.nih.gov/genbank/ and the sequence alignment from the journal’s website.

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Acknowledgments

We thank two anonymous reviewers for comments improving the manuscript and the editor Benjamin Torke for patient advice and support.

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Authors and Affiliations

  1. Botanical Museum, Lund University, PO Box 117, SE-22100, Lund, Sweden

    Eric Wahlsteen

  2. Department of Botany, Goalpara College, Goalpara, Assam, 783101, India

    Dipankar Borah

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Correspondence to Eric Wahlsteen.

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Appendices

Appendices

Appendix 1.

Herbarium vouchers (locality and collectors number) and GenBank accession numbers (ndhA intron; ndhF-rpl32 spacer; rpl32-trnL spacer) for sequences that were newly generated for this study.

Begonia acetosella var. hirtifolia: India, Arunachal, Upper Dibang District, S. of Anini, 28°46′42.2”N, 95°52′24.3″E, Borah 18,028; MW476744; MW476768; MW476792. Begonia acetosella var. hirtifolia: India Arunachal, Upper Dibang District, S. of Anini, 28°46′42.2”N 95°52′24.3″E, Borah 18,031; MW476745; MW476769; MW476793. Begonia acetosella var. hirtifolia: India, Arunachal, Upper Dibang District, S. of Anini, 28°46′42.2”N, 95°52′24.3″E, Borah s.n.; MW476746; MW476770; MW476794. Begonia annulata: India, Arunachal, Upper Dibang District, between Anini and Hunli, Borah 18,090; MW476747; MW476771; MW476795. Begonia atrofusca: India, Arunachal, Lower Dibang District, between Hunli and Roing, Borah 18,095; MW476748; MW476772; MW476796. Begonia atrofusca: India, Arunachal, Lower Dibang District, between Hunli and Roing, Borah 18,097; MW476749 MW476773; MW476797. Begonia dicressine: Myanmar, Kachin, Putao, heading mount Madoi, 27°40′50.4”N, 97°23′32.2″E, Borah 16,089; MW476750; MW476774; MW476798. Begonia difformis: Myanmar, Kachin, Putao, heading mount Madoi, 27°44′10.2”N, 97°22′56.7″E, Borah 16,009; MW476751; MW476775; MW476799. Begonia lorentzonii: India, Arunachal, Lower Dibang District, between Hunli and Roing, Borah 18,093; MW476752; MW476776; MW476800. Begonia mariachristinae: Myanmar, Kachin, Putao, heading mount Madoi, 27°40′50.4”N, 97°23′32.2″E, Wahlsteen 16,003; MW476753, MW476777, MW476801. Begonia palmata: India, Arunachal, Lower Dibang District, between Maydia Pass and Anini, Borah 18,013; MW476754; MW476778; MW476802. Begonia palmata: Myanmar, Kachin, Putao, heading mount Madoi, Wahlsteen 16,012; MW476755; MW476779; MW476803. Begonia rushforthii: India, Arunachal, Upper Dibang District, N. of Mipi by Mathun River 28°58′45.6”N 95°49′01.4″E, Borah 18,049; MW476756; MW476780; MW476804. Begonia rushforthii: India, Arunachal, Upper Dibang District, N. of Mipi by Mathun River, 28°58′45.6”N, 95°49′01.4″E, Borah 18,050, MW476757; MW476781; MW476805. Begonia rushforthii: India, Arunachal, Upper Dibang District, N. of Mipi by Mathun River. 28°58′45.6”N, 95°49′01.4″E, Borah18051; MW476758; MW476782; MW476806. Begonia silletensis: India, Arunachal, Lower Dibang District, between Mayodia Pass and Anini, Borah 18,011; MW476759; MW476783; MW476807. Begonia pseudoheydei: India, Arunachal, Upper Dibang District, S. of Anini, Borah 18,029; MW476764; MW476788; MW476812. Begonia pseudoheydei: India, Arunachal, Upper Dibang District, S. of Anini 28°46′42.2”N, 95°52′24.3″E, Borah 18,030; MW476765; MW476789; MW476813. Begonia pseudoheydei: India, Arunachal, Upper Dibang District, S. of Anini 28°46′42.2”N, 95°52′24.3″E, Borah 18,032; MW476766; MW476790; MW476814. Begonia pseudoheydei: India, Arunachal, Upper Dibang District, N. of Anini, Borah 18,034; MW476767; MW476791; MW476815.

Appendix 2.

GenBank accession numbers of downloaded sequences (ndhA intron, ndhF-rpl32 spacer, rpl32-trnL spacer).

B. aborensis: MH207019, MH207428, MH207849. B. acetosella: JF756367, JF756451, JF756535. B. brandisiana: JF756379, JF756463, JF756547. B. cathcartii: MH207089, MH207499, MH207915. B. ceratocarpa: MH207090, MH207500, MH207916. B. coccinea: KP712929, KP713137, KP713275. B. decora: JF756355, JF756439, JF756523. B. diadema: MH207129, MH207539, MH207952. B. dichroa: KP712931, KP713192, KP713343. B. dux: MH207137, MH207546, MH207960. Brachiaria eminii: KP712962, KP713193, KP713311. B. flagellaris: JF756353, JF756437, JF756521. B. gigabracteata: MH207165, MH207577, MH207991. B. handelii: MH207176, MH207586, MH208002. B. hatacoa: JF756354, JF756438, JF756522. B. limprichtii: MH207223, MH207633, MH208047. B. lithophila: MH207225, MH207635, MH208049. B. longifolia: JF756368, JF756452, JF756536. B. nepalensis: MH207257, MH207669, MH208079. B. obovoidea: JF756386, JF756470, JF756554. B. palmata: JF756360, JF756444, JF756528. B. pedatifida: MH207288, MH207700, MH208105. B. picta: MH207294, MH207708, MH208112. B. roxburghii: JF756371, JF756455, JF756539. B. rubella: MH207336, MH207749, MH208148. B. sikkimensis: JF756359, JF756443, JF756527. B. silletensis: JF756370, JF756454, JF756538. B. thomsonii: MH207398, MH207818, MH208210. B. tribenensis: MH207404, MH207826, MH208217. B. versicolor: JF756358, JF756442, JF756526. Bartramidula wilsonii: MH207423, MH207844, MH208231. B. yunnanensis: MH207426, MH207847, MH208234.

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Wahlsteen, E., Borah, D. A Checklist with Three New Species and Two New Country Records of Begonia from Dibang Valley, Arunachal Pradesh, India. Brittonia 74, 403–418 (2022). https://doi.org/10.1007/s12228-022-09725-9

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