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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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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DOI: https://doi.org/10.1007/s12225-010-9202-7