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Requests (1–2) for a binding decision on the name-giving taxa in the names Isoeto-Cicendietum Br.-Bl. 1967 and Verbeno-Gnaphalietum Rivas Goday 1970
expand article infoVasco Silva, José Antonio Molina§
‡ University of Lisbon, Lisbon, Portugal
§ Complutense University, Madrid, Spain
Open Access

Abstract

We propose to complete two association names of the class Isoeto-Nanojuncetea by selecting the name-giving taxa according to Art. 40 of the International Code of Phytosociological Nomenclature.

Taxonomic reference: Euro+Med (2021).

Keywords

binding decision, Isoeto-Nanojuncetea, nomenclature, phytosociology

(1) Request for a binding decision on the name-giving taxon in the name Isoeto longissimae-Cicendietum Br.-Bl. 1967 nom. corr

Original form of the name: Isoeto-Cicendietum

Syn.: Isoeto velatae-Cicendietum Br.-Bl. 1967 nom. inept. (Art. 44)

Typus: Braun-Blanquet 1967: 29 (holotypus).

Braun-Blanquet (1967: 29) published this Galician-Portuguese syntaxon with only one relevé from Braga (Minho province, Portugal), which is therefore the holotype. The only Isoetes in the original diagnosis is Isoetes velata A. Braun. However, as this is an illegitimate name (Troia and Greuter 2014), the correct name of the name-giving taxon of the association is Isoetes longissima Bory, and the name of the syntaxon must be corrected (Art. 44, Theurillat et al. 2021).

Braun-Blanquet did not indicate from which of the two Cicendia species present in the original diagnosis the association name was formed, C. filiformis or C. pusilla (= Exaculum pusillum; Euro+Med 2021). However, C. filiformis is more abundant in the type relevé (cover-abundance value 1) than C. pusilla (value +). As far as we can ascertain, no other relevés assigned to this association have been published (see, e.g., Brullo and Minissale 1998). Thus, we propose to select Cicendia filiformis as the name-giving taxon.

(2) Request for a binding decision on the name-giving taxon in the name Gnaphalio-Verbenetum supinae Rivas Goday 1970 nom. invers

Original form of the name: Verbeno-Gnaphalietum

Syn.: “com. prov. Gnaphalium luteo-album-Verbena supina” Rivas Goday 1956 (Art. 3b, 3c)

Typus: Rivas Goday 1970: 270–271, table 8, rel. 1 (lectotypus designated by Silva et al. 2021: 8).

The provisional community “Gnaphalium luteo-album-Verbena supina” was published by Rivas Goday in Rivas Goday et al. (1956: 370) together with seven relevés. Later, Rivas Goday (1970: 273) validated the syntaxon under the name “Verbeno-Gnaphalietum Rivas Goday 1955”, giving an unambiguous reference to his older work (though with the wrong year 1955; see Izco (1975) for information about the correct publication date) and publishing another table with ten relevés. The only Verbena species in the original diagnosis is V. supina, but there are two species of Gnaphalium: G. luteoalbum and G. uliginosum. Rivas Goday et al. (1956) used G. luteoalbum in the name of their provisional community, and this species is also more frequent and abundant in the original diagnosis than G. uliginosum. We therefore propose to select G. luteoalbum as the name-giving taxon of the Verbeno-Gnaphalietum.

In the type relevé, Verbena supina has a cover-abundance value of 2, whereas G. luteoalbum has a 1 and G. uliginosum a +. Therefore, the name ‘Verbeno-Gnaphalietum’ must be inverted (Arts. 10b and 42, Theurillat et al. 2021). If our proposal is accepted, the correct name of the association will be ‘Gnaphalio luteoalbi-Verbenetum supinae Rivas Goday 1970 nom. invers.’.

Author contributions

Both authors have contributed to the nomenclature research and writing the manuscript.

Acknowledgements

We appreciate the valuable comments and suggestions provided by the editor Wolfgang Willner. We thank Prof. Federico Fernández González (University of Castilla-La Mancha, Spain) for information on the publication date of the Anales del Instituto Botánico A.J. Cavanilles.

References

  • Braun-Blanquet J (1967) Vegetationsskizzen aus dem Baskenland mit Ausblicken auf das weitere Ibero-Atlantikum. II Teil. Vegetatio 14: 1–126. https://doi.org/10.1007/BF02639845
  • Brullo S, Minissale P (1998) Considerazioni sintassonomiche sulla classe Isoeto-Nanojuncetea [Syntaxonomic considerations on the class Isoeto-Nanojuncetea]. Itinera Geobotanica 11: 263–290.
  • Euro+Med (2021) Euro+Med PlantBase – the information resource for Euro-Mediterranean plant diversity. http://ww2.bgbm.org/EuroPlusMed/ [accessed 30 March 2021].
  • Izco J (1975) Índice de los Anales del Instituto Botánico A.J. Cavanilles (Anales del Jardín Botánico de Madrid), I–XXX. Anales del Instituto Botánico A. J. Cavanilles 32: 287–326.
  • Rivas Goday S (1970) Revision de las comunidades hispanas de la clase Isoeto-Nanojuncetea Br.-Bl. & Tüxen 1943. Anales del Instituto Botánico A. J. Cavanilles 27: 225–276.
  • Rivas Goday S, Borja Carbonell J, Monasterio Fernández A, Fernandéz-Galiano E, Rivas-Martínez S (1956) Aportaciones a la fitosociologia hispanica. Anales del Instituto Botánico A. J. Cavanilles 13: 335–422.
  • Silva V, Ribeiro S, Molina JA, Pinto-Cruz C, Costa JC, Espírito-Santo D (2021) Resolving some nomenclatural issues on Isoeto-Nanojuncetea and four new communities of the Iberian Peninsula. Mediterranean Botany 42: e63383. https://doi.org/10.5209/mbot.63383
  • Theurillat JP, Willner W, Fernández-González F, Bültmann H, Čarni A, Gigante D, Mucina L, Weber H (2021) International Code of Phytosociological Nomenclature. 4th edn. Applied Vegetation Science 24: e12491. https://doi.org/10.1111/avsc.12491

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