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Tabaroa, a new genus of Leguminosae tribe Brongniartieae from Brazil

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Summary

A new genus of Leguminosae in tribe Brongniartieae is proposed based on a new species endemic to the Caatinga of Bahia state. The new genus is named as Tabaroa L. P. Queiroz, G. P. Lewis & M. F. Wojc. and the new species as Tabaroa caatingicola L. P. Queiroz, G. P. Lewis & M. F. Wojc. A phylogenetic study of the Brongniartieae based on nuclear rDNA ITS and plastid matK sequences supports a closer relationship between Tabaroa and Harpalyce Moc. & Sessé than to the two South American genera Poecilanthe Benth. and Cyclolobium Benth., which are more similar morphologically. Optimisation of selected morphological characters on one of the most parsimonious trees indicates that the sessile ovary and the explosive pollen presentation are putative synapomorphies of the Tabaroa-Harpalyce clade. The genus Tabaroa may be diagnosed by the absence of peltate glandular trichomes; leaves imparipinnate, exstipellate and with opposite leaflets; flowers sessile, not resupinate, grouped in panicles; anthers apiculate; and fruit indehiscent. The only known species inhabits areas of arboreal caatinga on sandy soil in southwestern Bahia, near the boundaries of Dom Basílio and Livramento de Nossa Senhora municipalities.

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Acknowledgements

We thank Brian Stannard who collected the first known material of Tabaroa and brought his collection to our attention; Ana Maria Giulietti, Ray Harley, Kelly Leite and Maria José Andrade collected a number of the specimens cited or helped with the fieldwork of LPQ; Domingos Cardoso, José Eduardo Meireles, Hortensia Bautista and two anonymous reviewers critically read an earlier draft of the paper; Margaret Tebbs prepared the beautiful line drawing in Fig. 6; Katherine Challis and Melanie Thomas prepared the Latin diagnosis and LPQ was supported by a pq grant from CNPq.

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Correspondence to Luciano Paganucci de Queiroz.

Appendix 1

Appendix 1

Taxa sampled for the nuclear DNA ITS and plastid matK. Codes in the table refer to GenBank accession numbers (www.ncbi.nih.gov).

Taxa

ITS

matK

Tribe Brongniartieae

Brongniartia alamosana Rydb.

AF467022

AF142688, GQ246147

Brongniartia magnibracteata Schltdl.

AF287638

Brongniartia inconstans S.Watson

GQ250075

GQ246146

Brongniartia lupinoides (Kunth) Taub.

GQ246149

Brongniartia peninsularis Rose

GQ250076

GQ246148

Brongniartia ulbrichiana Harms

GQ246145

Cyclolobium brasiliense Benth.

AF287637, AF467041

AF142686

Harpalyce arborescens A.Gray

AF142689

Harpalyce brasiliana Benth.

AF204711, AF204733

GQ246153

Harpalyce formosa DC.

GQ246154

Harpalyce lanata L. P. Queiroz

GQ250077

Harpalyce pringlei Rose

GQ250078

Hovea elliptica (Sm.) DC.

AF287640

Hovea longipes Benth.

GQ250079

Hovea purpurea Sweet

AY386889.1

Hovea trisperma Benth.

AF287639

Lamprolobium fruticosum Benth.

GQ250080

GQ246159

Plagiocarpus axillaris Benth.

GQ246160

Poecilanthe falcata Benth.

AF467492.1

GQ246155

Poecilanthe itapuana G. P. Lewis

GQ250081

Poecilanthe parviflora Benth.

AF187089

AF142687

Poecilanthe subcordata Benth.

GQ250082

GQ246156

Tabaroa catingicola L. P. Queiroz, G. P. Lewis & M. F. Wojc.

GQ250083, GQ250084

GQ246161, GQ246162

Templetonia hookeri Benth.

GQ250085

GQ246157

Templetonia retusa R. Br.

AF287636

GQ246158

Templetonia sulcata Benth.

AF287635

Tribe Crotalarieae

Aspalathus cephalotes Thunb.

EF457677.1

Crotalaria podocarpa DC.

AJ313500.1

Crotalaria pumila Ortega

AY386867.1

Lebeckia sericea Thunb.

GQ246144

Tribe Dalbergieae

Andira galeottiana Standl.

U59889.1

Hymenolobium mesoamericanum H. C. Lima

AF187087

Vatairea sp.

AF187088

Tribe Genisteae

Anarthrophyllum desideratum (DC.) Benth.

AY386923.1

Chamaecytisus mollis (Cav.) Greuter & Burdet

AF007472

Cytisus scoparius (L.) Link

AY386902.1

Cytisus supranubius (L.f.) Kuntze

AF351102.1

Dichilus lebeckioides DC.

GQ246143

Genista monspessulana (L.) Johnson

AY386862.1

Genista tinctoria L.

AF351094.2

Lupinus anatolicus W. Święcicki & W. K. Święcicki

AF108085

Lupinus argenteus Pursh

AY386956.1

Lupinus consentinii Guss.

AY386943.1

Melolobium microphyllum Eckl. & Zeyh.

AF287683

Spartium junceum L.

AY386901.1

Tribe Liparieae

Calpurnia aurea (Aiton) Benth.

AJ409913.1

AY386951.1

Liparia splendens (Burm. f.) Bos & de Wit

AM261490.1

Podalyria speciosa Eckl. & Zeyh.

AM261677.1

Tribe Sophoreae

Acosmium panamense (Benth.) Yakovlev

AF142684.1

Ammodendron argenteum (Pall.) Kuntze

AY386957.1

Bolusanthus speciosus (Bolus) Harms

AF142685.1

Bowdichia virgilioides Kunth

AY386937.1

Calia arizonica (S.Watson) Yakovlev

GQ250086

AY386864.1

Calia secundiflora (Gomez–Ortega) Yakovlev

EF457711.1

AF142693.1

Cladrastis delavayi Prain

AY386861.1

Cladastis lutea Raf.

AF142694.1

Cladrastis platycarpa (Maxim.) Makino

AY386935

Dicraeopetalum stipulare Harms

GQ246142

Diplotropis brasiliensis (Tul.) Benth.

AY386939.1

Diplotropis martiusii Benth.

AY386938.1

Maackia amurensis Ruprecht & Maxim.

Z72336

AY386944.1

Ormosia colombiana Rudd

AY386960.1

Ormosoa formosana Kaneh.

AF142682.1

Sophora davidii Kom. ex Pavlov

AF467496

AY386958.1

Sophora macrocarpa Sm.

Z95563, Z95577

Sophora microphylla Aiton

AY056075

Sophora nuttalliana B. L. Turner

AY386865.1

Sophora tomentosa L.

AY725482

Sophora toromiro Skottsb.

AJ409921

Styphnolobium affine (Torr. & A. Gray) Walp.

U59886

Styphnolobium japonicum (L.) Schott

Z72340, Z72341

AY386962.1

Tribe Swartzieae

Bobgunnia madagascariensis (Desv.) J. H. Kirkbr. & Wiersema

AY386940.1

Swartzia flaemmingii Raddi

AY386941.1

Swartzia jororii Harms

AY386942.1

Tribe Thermopsideae

Baptisia australis (L.) R. Br.

AY386900.1

Piptanthus nepalensis D. Don

Z72320, Z72321

AY386924.1

Piptanthus tomentosus Franch.

AY091570

Thermopsis rhombifolia (Nutt.) Richards

AF007468

AY386866.1

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de Queiroz, L.P., Lewis, G.P. & Wojciechowski, M.F. Tabaroa, a new genus of Leguminosae tribe Brongniartieae from Brazil. Kew Bull 65, 189–203 (2010). https://doi.org/10.1007/s12225-010-9202-7

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