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25 August 2017 A New Species of Oxypetalum (Apocynaceae, Asclepiadoideae) from Northern Argentina
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Abstract

Oxypetalum is the largest genus of Oxypetalinae (Apocynaceae-Asclepiadoideae) and presents its highest diversity in southern South America. A new species, Oxypetalum globosum, from montane environments of northern Argentina, is described, illustrated, and compared to similar species. Data on its habitat, distribution, ecology, and phenology are provided. This is an outstanding species within Oxypetalum due to its flowers with maroon, globose corollas, with patent, rounded corolla lobes, and a bright pink, exserted, hemispheric stylar-head appendage, which suggest fly- pollination. The difficulties in delimiting genera of Oxypetalinae are discussed. A key to the species of Oxypetalum from northern Argentina is included.

© 2017 by the American Society of Plant Taxonomists
Claudia M. Martín, Christian A. Zanotti, and Cecilia Ezcurra "A New Species of Oxypetalum (Apocynaceae, Asclepiadoideae) from Northern Argentina," Systematic Botany 42(3), 578-583, (25 August 2017). https://doi.org/10.1600/036364417X696050
Published: 25 August 2017
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