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A new species for the legume genus Chamaecrista (Fabaceae, Caesalpinioideae) supported by molecular, morphological, and anatomical data

  • Marcos J. da Silva
  • Alessandro O. de SouzaEmail author
  • Alexandre A. Alonso
Original Article
  • 81 Downloads

Abstract

Chamaecrista oligandra from the Brazilian Cerrado, the most diverse savannah and one of 34 hot spots of the world, is herein described, illustrated, and compared with C. flexuosa var. flexuosa and C. parvistipula, its morphologically similar congeners. The flowering and fruiting, environmental preferences, distribution map, images, and preliminary conservation status of the new species are provided. Additionally, leaf anatomy and scanning electron microscopy of the leaf petiolar nectaries of the new species and the two putative closest relatives were compared. A phylogeny based on the noncoding plastidial (trnL-trnF) and nuclear ribosomal internal transcribed spacer indicated the proper placement of C. oligandra sp. nov. in Chamaecrista sect. Chamaecrista ser. Flexuosae, which is a taxonomic group that includes sub-shrubby species with underground systems conspicuously developed, leaflets with palmate-dimidiate venation, and flowers in an axillary fascicle. A key to identify species of the C. ser. Flexuosae series is provided to facilitate recognition of species that are distributed in open areas of the Brazilian Cerrado and frequently misidentified in collections.

Keywords

Cassiinae Cerrado Endemism Taxonomy 

Notes

Acknowledgements

The first author thanks Renato Galhardo for the illustrations and the LABMIC team (Multiuser Laboratory for High-Resolution Microscopy, at the Federal University of Goiás).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

606_2019_1569_MOESM1_ESM.pdf (17 kb)
Supplementary material 1 (PDF 17 kb)

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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  • Marcos J. da Silva
    • 1
  • Alessandro O. de Souza
    • 2
    Email author
  • Alexandre A. Alonso
    • 3
  1. 1.Laboratory of Morphology and Plant Taxonomy, Biological Institute Science, Department of BotanyFederal University of GoiásGoiâniaBrazil
  2. 2.Programa de Pós-graduação em Botânica, Instituto de Ciências BiológicasUniversidade de BrasíliaAsa Norte, BrasíliaBrazil
  3. 3.Laboratory of Plant Anatomy, Biological Institute Science, Department of BotanyFederal University of GoiásGoiâniaBrazil

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