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Pentagonia lanciloba, a new species of Rubiaceae (Hippotideae) from northwestern Ecuador

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Abstract

Pentagonia lanciloba, a new species of Rubiaceae (Hippotideae) from the wet forests of northwestern Ecuador, is described. This new species is characterized by pinnatifid leaf blades with tapered and long-decurrent subsessile bases, floral bracts with long-acuminate to caudate apices, calyces with narrowly-lanceolate and remarkably long lobes (15–28 mm), and tomentose, orange to red corollas. The new species is illustrated, and its relationship to morphologically similar species is discussed.

Resumen

Se describe Pentagonia lanciloba, una nueva especie de Rubiaceae (Hippotideae) de los bosques muy húmedos del noroccidente de Ecuador. Esta nueva especie se caracteriza por presentar láminas pinnatífidas de bases gradualmente angostas, decurrentes y subsésiles, brácteas florales rojas con ápices largos-acuminados o caudados, cálices con lóbulos angosto-lanceolados, distintivamente más largos (15–28 mm) y corolas tomentosas anaranjadas o rojas. Esta nueva especie es ilustrada y sus relaciones con las especies morfológicamente más cercanas son aquí discutidas.

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Literature Cited

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Acknowledgments

Thanks are due to Dr. Carmen Bonifaz for field support in Ecuador, Ing. Alfredo Arévalo for granting permission to collect in Cerro Mutiles, Reinaldo Aguilar and Catherine Bainbridge for assistance in Costa Rica, María Stapf for providing images of the specimens of Pentagonia of SCZ, and to two anonymous reviewers for criticizing the manuscript. The author is also indebted to the curators of F, GB, MO and S, for the loan of specimens, and to the following herbaria, which he had the pleasure of visiting: GUAY, INB, MO, QCA, QCNE, SEL, US, and WIS.

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  1. The New York Botanical Garden, 200th St. and Kazimiroff Avenue, Bronx, NY, 10458-5126, USA

    Xavier Cornejo

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  1. Xavier Cornejo
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Correspondence to Xavier Cornejo.

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Cornejo, X. Pentagonia lanciloba, a new species of Rubiaceae (Hippotideae) from northwestern Ecuador. Brittonia 62, 7–11 (2010). https://doi.org/10.1007/s12228-009-9085-9

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  • DOI: https://doi.org/10.1007/s12228-009-9085-9

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