Rhynchospora unguinux (Cyperaceae), a new species of Rhynchospora sect. Pauciflorae from the Serra dos Carajás, Pará, Brazil

Summary

Rhynchospora unguinux is described as a new species of Cyperaceae from the Serra dos Carajás (Pará, Brazil). Morphological description, taxonomic comments, distribution, habitat data, a preliminary conservation status, and illustrations are provided. Rhynchospora unguinux is characterised by the caespitose habit, ciliate involucral bracts, vinaceous proximal and medial glumes with navicular apex, proximally plumose perianth bristles, and nutlets with involute claw-like margins with lamellar lobes. The new species is similar to R. subplumosa and R. trichochaeta but differs from them by the colour pattern of the spikelets, and the apex shape of the proximal and medial glumes.

This is a preview of subscription content, log in to check access.

Fig. 1
Fig. 2
Fig. 3
Map 1

References

  1. Araújo, A. C., Thomas, W. W. & Longhi-Wagner, H. M. (2008). Cladistic analysis of Rhynchospora sect. Pluriflorae Kük. In: R. Naczi (ed.), Sedges: Uses, Diversity, and Systematics of the Cyperaceae. Monogr. Syst. Bot. Missouri Bot. Gard. 108: 279 – 288.

  2. Araújo, A. C., Longhi-Wagner, H. M. & Thomas, W. W. (2012). A synopsis of Rhynchospora sect. Pluriflorae (Cyperaceae). Brittonia 64: 381 – 393.

  3. Bachman, S., Moat, J., Hill, A. W., de Torre, J. & Scott, B. (2011). Supporting Red List threat assessments with GeoCAT: Geospatial Conservation Assessment Tool. ZooKeys 150: 117 – 126.

    Article  Google Scholar 

  4. Flora do Brasil 2020 em construção (2018). Jardim Botânico do Rio de Janeiro. Available at: http://floradobrasil.jbrj.gov.br/. Accessed 28 Aug. 2018.

  5. Freitas, M. L. D. (1986). Algumas considerações sobre a região-programa. In: J. M. G. Almeida (org.), Carajás: desafio político, ecologia e desenvolvimento, pp. 22 – 29. CNPq, Brasília.

  6. IUCN (2014). Guidelines for using the IUCN Red List Categories and Criteria. Version 11. IUCN, Gland and Cambridge.

    Google Scholar 

  7. Koyama, T. (1972). The botany of the Guayana Highland — Part IX. Cyperaceae — Rhynchosporeae and Cladieae. Mem. New York Bot. Gard. 23: 23 – 89.

    Google Scholar 

  8. Kükenthal, G. (1949). Vorarbeiten zu einer Monographie der Rhynchosporoideae. Rhynchospora. Bot. Jahrb. Syst. 74: 375 – 509.

    Google Scholar 

  9. Kükenthal, G. (1950). Vorarbeiten zu einer Monographie der Rhynchosporoideae. Bot. Jahrb. Syst. 75: 90 – 195.

    Google Scholar 

  10. Kükenthal, G. (1951). Vorarbeiten zu einer Monographie der Rhynchosporoideae. Bot. Jahrb. Syst. 75: 273 – 314.

    Google Scholar 

  11. Mota, N. F. O., Silva, L. V. C., Martins, F. D. & Viana, P. L. (2015). Vegetação sobre sistemas ferruginosos da Serra dos Carajás. In: F. F. Carmo & L. H. Y. Kamino (org.), Geossistemas ferruginosos do Brasil: áreas prioritárias para conservação da diversidade geológica e biológica, patrimônio cultural e serviços ambientais. Belo Horizonte, 3i Editora, Belo Horizonte.

  12. Mota, N. F. O., Watanabe, M. T. C., Zappi, D. C., Hiura, A. L., Pallos, J., Viveros, R. S., Giulietti, A. M. & Viana, P. L. (2018). Cangas da Amazônia: a vegetação única de Carajás evidenciada pela lista de fanerógamas. Rodriguésia 69: 1417 – 1434.

  13. Nunes, C. S., Bastos, M. N. C. & Gil, A. S. B. (2016). Flora of the cangas of the Serra dos Carajás, Pará, Brasil: Cyperaceae. Rodriguésia 67: 1329 – 1366.

    Article  Google Scholar 

  14. Schneider, L. J. C., Bastos, M. N. C., Costa-Neto, S. V. & Gil, A. S. B. (2017). Sinopse do gênero Rhynchospora (Cyperaceae) nas restingas do estado do Pará, Brasil. Rodriguésia 68: 653 – 670.

    Article  Google Scholar 

  15. Strong, M. T. (2006). Taxonomy and distribution of Rhynchospora (Cyperaceae) in the Guianas, South America. Contr. U. S. Natl. Herb. 53: 1 – 225.

    Google Scholar 

  16. Thomas, W. W. (1984). The systematics of Rhynchospora sect. Dichromena. Mem. New York Bot. Gard. 37: 1 – 116.

    CAS  Google Scholar 

  17. Thomas, W. W., Araújo, A. C. & Alves, M. (2009). A preliminary molecular phylogeny of the Rhynchosporeae (Cyperaceae). In: W. W. Thomas, D. A. Simpson, A. A. Reznicek & J. R. Starr (eds), Cyperaceae – Special Issue. Bot. Rev. 75: 22 – 29.

  18. Viana, P. L., Mota, N. F. O., Gil, A. S. B., Salino, A., Zappi, D. C., Harley, R. M., Ilkiu-Borges, A. L., Secco, R. S., Almeida, T. E., Watanabe, M. T. C., Santos, J. U. M., Trovó, M., Maurity, C. & Giulietti, A. M. (2016). Flora of the cangas of the Serra dos Carajás, Pará, Brazil: history, study area and methodology. Rodriguésia 67: 1107 – 1124.

    Article  Google Scholar 

Download references

Acknowledgements

We are grateful to the Conselho Nacional de Pesquisa (CNPq) for a scholarship to LJCS (Process: 131573/2017-9); to the Programa de Capacitação Institucional (PCI/MPEG/MCTIC) for a fellowship to CSN (Process: 312832/2016-8); to the Instituto Tecnológico Vale (ITV) for technical and scientific cooperation (Process: 01205.000250/2014-10); to the ICMBio and Frederico Martins for granting collecting permits in the study area; to the curators of the consulted herbaria (BHCB, IAN, INPA, MG, and RB); to João Silveira for the preparation of illustrations and to Alexander Popovkin for the English revision. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.

Author information

Affiliations

Authors

Corresponding author

Correspondence to Layla Jamylle Costa Schneider.

Additional information

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Rights and permissions

Reprints and Permissions

About this article

Verify currency and authenticity via CrossMark

Cite this article

Schneider, L.J.C., de Sá Nunes, C., Viana, P.L. et al. Rhynchospora unguinux (Cyperaceae), a new species of Rhynchospora sect. Pauciflorae from the Serra dos Carajás, Pará, Brazil. Kew Bull 74, 60 (2019). https://doi.org/10.1007/s12225-019-9846-x

Download citation

Keywords

  • Amazon
  • canga
  • ironstone outcrops
  • Neotropics
  • Rhynchospora subgen. Haplostyleae