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Kew Bulletin

, Volume 68, Issue 1, pp 173–177 | Cite as

Sphinctanthus fluvii-dulcis (Rubiaceae: Gardenieae), a new species from the Rio Doce Valley, Atlantic forest of Minas Gerais, Brazil, with detailed observations on ovary morphology

  • Piero G. Delprete
  • Claes Persson
Article

Summary

A new species of Sphinctanthus from the Rio Doce Valley, Atlantic forest in the state of Minas Gerais, Brazil, is here described and illustrated. The species is peculiar within the genus by having placentation entirely parietal, while in the other species of Sphinctanthus the placentation is basally axial and distally parietal. In addition, despite its bright orange flowers (being a plant with high potential as an ornamental), it is only known from two collections from nearby localities, indicating that it is a rare and critically endangered species.

Key Words

Placentation taxonomy 

Resumo

Uma nova espécie de Sphinctanthus proveniente do Vale do Rio Doce, na Floresta Atlantica do Estado de Minas Gerais, Brasil, é aqui descrita e ilustrada. A espécie é peculiar dentro do gênero por ter placentação completamente parietal, em quanto que nas outras espécies a placentação é basalmente axial e distalmente parietal. Também, apesar das flores de cor laranja vivo (sendo uma planta com alto potencial de ser cultivada como ornamental), ela é conhecida somente por duas coletas em localidades muito proximas, indicando que é uma espécie rara e criticamente em perigo.

Notes

Acknowledgements

We would like to thank the staff of the BHCB herbarium (Federal University of Minas Gerais, Belo Horizonte), for help in consulting their collection. We are much indebted to Harri Lorenzi (HPL), Eugenio Arantes de Melo and Marcos Lacerda for sharing digital images, herbarium specimens, pickled flowers and important information, which were essential for the description of this remarkable new species. We are also grateful to Erik Ljungstrand (GB) for checking the ICBN, and confirming that the specific epithet is better kept hyphenated.

References

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Copyright information

© The Board of Trustees of the Royal Botanic Gardens, Kew 2012

Authors and Affiliations

  1. 1.Herbier de GuyaneInstitut de Recherche pour le Developpement (IRD), UMR AMAPCayenne CédexFrance
  2. 2.Department of Biological and Environmental SciencesUniversity of GothenburgGöteborgSweden

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