Kew Bulletin

, Volume 65, Issue 2, pp 189–203 | Cite as

Tabaroa, a new genus of Leguminosae tribe Brongniartieae from Brazil

  • Luciano Paganucci de QueirozEmail author
  • Gwilym P. Lewis
  • Martin F. Wojciechowski


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.

Key Words

Brongniartieae ITS Leguminosae matK New genus Phylogeny taxonomy 



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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Copyright information

© The Board of Trustees of the Royal Botanic Gardens, Kew 2010

Authors and Affiliations

  • Luciano Paganucci de Queiroz
    • 1
    Email author
  • Gwilym P. Lewis
    • 2
  • Martin F. Wojciechowski
    • 3
  1. 1.Universidade Estadual de Feira de Santana, Depto. de Ciências BiológicasFeira de SantanaBrazil
  2. 2.Royal Botanic Gardens, KewRichmondUK
  3. 3.School of Life SciencesArizona State UniversityTempeUSA

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