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Dioscorea chusqueifolia (Dioscoreaceae), a new species from northern Peru

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Abstract

A new species, Dioscorea chusqueifolia (Dioscoreaceae), is described and illustrated. It is known only from two nearby localities in the Province of Bolívar (Department of La Libertad) in northern Peru, where it grows in the transitional zone between equatorial dry forest and montane forest at 700–900 m elevation. The new species is distinguished by a unique combination of features, such as the form and size of its leaves (narrowly lanceolate and 0.15–1.9 cm wide), the presence of six stamens, the absence of a pistilodium, a reduced stylar column, terete styles, and peripherally winged seeds; because of this unique set of characters, D. chusquefolia cannot be placed within any of the currently recognized sections within Dioscorea.

Resumen

Se describe e ilustra una nueva especie, Dioscorea chusqueifolia (Dioscoreaceae). Esta nueva especie se conoce solamente de dos localidades vecinas en la Provincia de Bolívar (Departamento de La Libertad) en el norte de Perú, en donde crece en áreas transicionales entre el Bosque Seco Ecuatorial y el Bosque Montano en elevaciones de 700–900 m. Esta nueva especie se caracteriza por una única combinación de características como la forma y el tamaño de las hojas (angostamente lanceoladas entre 0.15–1.9 cm de ancho), seis estambres, pistilodio ausente, columna estilar reducida, ramas de los estilos teretes y semillas aladas periféricamente, que no permiten relacionarla a alguna otra sección dentro del género.

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Acknowledgements

This study was funded by the William L. Brown Center at the Missouri Botanical Garden. We gratefully acknowledge the tireless help of Ing. Carlos Vega Ocaña, and Biol. Carolina Téllez at INBIAPERU, as well as the Missouri Botanical Garden Herbarium for granting full access to its collection of Dioscorea. We also thank Alba Arbeláez of the Missouri Botanical Garden for the beautiful illustrations of the new species and the anonymous reviewers for comments on the manuscript.

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Authors and Affiliations

  1. William L. Brown Center, Missouri Botanical Garden, St. Louis, MO, 63110, United States

    Carolina Romero-Hernández

  2. Laboratorio de Recursos Naturales, UBIPRO, Facultad de Estudios Superiores Iztacala, UNAM, Av. De Los Barrios 1, Los Reyes Iztacala, C.P., 54090, Mexico City, Estado de México, Mexico

    Oswaldo Téllez-Valdés

  3. Saving Knowledge, Casilla 92, Chicani, La Paz, Bolivia

    Rainer W. Bussmann

Authors
  1. Carolina Romero-Hernández
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  2. Oswaldo Téllez-Valdés
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  3. Rainer W. Bussmann
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Correspondence to Carolina Romero-Hernández.

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Romero-Hernández, C., Téllez-Valdés, O. & Bussmann, R.W. Dioscorea chusqueifolia (Dioscoreaceae), a new species from northern Peru. Brittonia 71, 353–358 (2019). https://doi.org/10.1007/s12228-019-09587-8

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