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Darwiniana, nueva serie

Print version ISSN 0011-6793On-line version ISSN 1850-1699

Darwiniana, nueva serie vol.3 no.2 San Isidro Dec. 2015



Andropogon × Paraguariensis, a new name for Andropogon × Velutinus (Poaceae, Andropogoneae)


Nicolás Nagahama1, Ana M. Anton2, María I. Hidalgo3 & Guillermo A. Norrmann3

1 Estación Experimental Agroforestal Esquel (INTA), Chacabuco 513; (autor for correspondence).
2 Instituto Multidisciplinario de Biología Vegetal (IMBIV) - CONICET, Casilla de Correo 495, 5000 Córdoba, Argentina.
3 Facultad de Ciencias Agrarias, Universidad Nacional del Nordeste, Sargento Cabral 2131, Casilla de Correo 209, 3400 Corrientes, Argentina.



The new name Andropogon × paraguariensis Norrmann & Nagahama is proposed to replace the illegitimate name Andropogon × velutinus Norrmann & Nagahama, a natural hybrid from southern South America.

Keywords. Andropogon; Andropogoneae; Inter-specific hybrids; Nomenclature; Southern South America.


Se propone el nuevo nombre, Andropogon × paraguariensis Norrmann & Nagahama para reemplazar al nombre ilegítimo Andropogon × velutinus Norrmann & Nagahama, un híbrido natural del cono sur de Sudamérica.

Palabras clave. Andropogon; Andropogoneae; Híbridos inter-específicos; Nomenclatura; Sur de Sudamérica.

Original recibido el 7 de septiembre de 2015,
aceptado el 9 de octubre de 2015
Editora Asociada: Alicia López


Regrettably, Andropogon × velutinus Norrmann & Nagahama in Nagahama et al. (2012) was not validly published because the existence of a homonymous was overlooked (cf. Articles 53.1 and 53.2, McNeill et al., 2012). Hooker (1896:194) proposed the name Andropogon velutinus Hook. f., a basionym for Chrysopogon velutinus (Hook. f.) Bor (1960: 119). The epithet paraguariensis is available to be used within Andropogon, and herein this oversight is emended.

Andropogon × paraguariensis Norrmann & Nagahama, nom. nov.

Andropogon × velutinus Norrmann & Nagahama, Darwiniana 50(1): 117. 2012, non Hook. f. (1896). TYPE: Paraguay, Depto. Concepción, 38 km E de Concepción por ruta 5, 20-IV-1995, G. A. Norrmann 219 (holotype CORD!; isotype CTES!).

Andropogon × paraguariensis belongs to the Andropogon lateralis complex. It grows in Paraguay, west-central and southeastern Brazil, forming small but dense populations in confined sympatric areas -;swamps-; among populations of the parental species (A. bicornis L. and A. glaziovii Hack.; Nagahama et al., 2012). This species is distinguished by its main axis of the synflorescence with 37-71 branches; first branch on the main axis of synflorescence with 34-49 branches; second branch on the main axis of synflorescence with 8-10 internodes; articulate rachis internodes 1.9-3 mm long, with hairs 5.3-8.2 mm long; pedicel 1.6-2.8 × 0.1-0.2 mm, with hairs 5.3-8.2 mm long; and pedicellate spikelet 0.5-1 × 0.05 mm. The epithet refers to the Paraguay River, which runs through the region where the type specimen was collected.
A detailed description, examined materials and illustrations of the taxon are presented in Nagahama et al. (2012).


We thank Kanchi N. Gandhi (HUH) for bringing this omission to our attention and two anonymous reviewers for their constructive suggestions that greatly improved the manuscript. This work was supported by CONICET (PIP 112-200801-01557 and Doctoral fellowship), SECyT-UNC and SGCyT-UNNE.


1. Bor, N.L. 1960. The grasses of Burma, Ceylon, India and Pakistan (excluding Bambuseae). London: Pergamon Press.         [ Links ]

2. Hooker, J. D. 1896. The flora of British India. London: L. Reeve.         [ Links ]

3. McNeill, J.; F. R. Barrie, W. R. Buck, V. Demoulin, W. Greuter, D. L. Hawksworth, P. S. Herendeen, S. Knapp, K. Marhhold, J. Prado, W. F. Prud'homme van Reine, G. F. Smith, J. H. Wiersema & N. J. Turland (eds.). 2012. International Code of Nomenclature for algae, fungi and plants (Melbourne Code): adopted by the Eighteenth International Botanical Congress Melbourne, Australia, July 2011. Regnum Vegetabile 154. Königstein: Koeltz Scientific Books.         [ Links ]

4. Nagahama, N., A. M. Anton, M. I. Hidalgo & G. A. Norrmann. 2012. Naming hybrids in the Andropogon lateralis complex (Andropogoneae, Poaceae) after multivariate analysis. Darwiniana 50: 114-123.         [ Links ]

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