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Two new species of Cephalocarpus (Cryptangieae, Cyperaceae) from the Venezuelan Guayana Highland

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Abstract

While studying the collections of Cryptangieae (Cyperaceae) at the New York Botanical Garden, we found specimens of two undescribed species, which based on their achene morphology are assigned to the genus Cephalocarpus. We name and describe these two new species, C. insolitus and C. neblinensis, from the Guayana Highland of northern South America. Both species have three fimbriate hipoginium scales on opposite sides of the fruit and a constriction zone between the main body and the beak of the achene, as in other species of Cephalocarpus. We also provide illustrations, distribution maps and comments about the taxonomy and distribution for each species.

Resumo

Durante o estudo das coleções de Cryptangieae (Cyperaceae) no Jardim Botânico de Nova Iorque, foram encontrados espécimes de duas espécies desconhecidas para a ciência; as quais, com base na morfologia do aquênio, pertencem a Cephalocarpus. As espécies foram nomeadas e descritas: C. insolitus e C. neblinensis; advindas do planalto das Guianas no norte da América do Sul. Ambas espécies apresentam três escamas hipóginas fimbriadas opostas aos lados do fruto e uma região de constrição entre a base e o bico do aquênio, como as demais espécies de Cephalocarpus. São providas ilustrações, mapas de distribuição e comentários sobre a taxonomia e distribuição para cada espécie.

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Acknowledgments

We thank CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico), CAPES (Coordenação de Aperfeiçoamento de Pessoal de Ensino Superior) and PDSE/CAPES (Programa de Doutorado-sanduíche no Exterior) for scholarships to the first author. Also, the Missouri Botanical Garden for a grant from the Becas Elizabeth E. Bascom para Botánicas Latinoamericanas program (2015), and FAEPEX/UNICAMP (2014, 2015, 2016) for additional financial support. SMC thanks the staff of The New York Botanical Garden and the staff of all herbaria visited for their hospitality and helpfulness, and all colleagues that contributed to field and lab work. MCEA also thanks the CNPq for a productivity grant (N° 311744/2017-6).

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Authors and Affiliations

  1. Department of Biology, Federal University of Lavras – UFLA, P.O Box 3037, Lavras, Minas Gerais, CEP 37200-000, Brazil

    Suzana Maria Costa

  2. Institute of Biology, Department of Plant Biology, University of Campinas, P.O. Box 6109, Campinas, SP, 13083-970, Brazil

    Maria do Carmo Estanislau do Amaral

  3. New York Botanical Garden, Bronx, NY, USA

    William Wayt Thomas

Authors
  1. Suzana Maria Costa
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  2. Maria do Carmo Estanislau do Amaral
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  3. William Wayt Thomas
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Correspondence to Suzana Maria Costa.

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Costa, S.M., Estanislau do Amaral, M. & Thomas, W.W. Two new species of Cephalocarpus (Cryptangieae, Cyperaceae) from the Venezuelan Guayana Highland. Brittonia 73, 160–166 (2021). https://doi.org/10.1007/s12228-021-09652-1

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  • DOI: https://doi.org/10.1007/s12228-021-09652-1

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