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Issue: Vol. 752 No. 3: 23 Apr. 2026
Type: Article
Published: 2026-04-23
DOI: 10.11646/phytotaxa.752.3.3
Page range: 209-218
Abstract views: 0
PDF downloaded: 0

Arenaria radians as a synonym of Arenaria dicranoides (Caryophyllaceae): morphological insights with additional notes

Herbario QCA, Centro de Investigaciones de la Biodiversidad CIBIO, Facultad de Ciencias Exactas, Naturales y Ambientales, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Vicente Ramón Roca, 170525 Quito, Ecuador
Herbario QCA, Centro de Investigaciones de la Biodiversidad CIBIO, Facultad de Ciencias Exactas, Naturales y Ambientales, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Vicente Ramón Roca, 170525 Quito, Ecuador
Herbario QCA, Centro de Investigaciones de la Biodiversidad CIBIO, Facultad de Ciencias Exactas, Naturales y Ambientales, Pontificia Universidad Católica del Ecuador, Av. 12 de Octubre 1076 y Vicente Ramón Roca, 170525 Quito, Ecuador
Andes Caryophyllales Ecuador Páramo taxonomy Eudicots

Abstract

The genus Arenaria in Ecuador has not been well approached in a taxonomic way, leading to several misinterpretations throughout the time. Based on worldwide databases, ten accepted Arenaria species would occur in the country. As part of an ongoing work towards a new volume of the series Flora of Ecuador, we have verified that two endemic species (A. radians and A. dicranoides) belong to the same taxon and their names should be treated as heterotypic synonyms. Notes regarding the morphology of Arenaria dicranoides (which have nomenclatural prioritiy on Arenaria radians), its distribution, ecology, and an updated conservation assessment are provided.

References

  1. Bachman, S., Moat, J., Hill, A., de la Torre, J. & Scott, B. (2011) Supporting Red List threat assessments with GeoCAT: geospatial conservation assessment tool. ZooKeys 150: 117–126. https://doi.org/10.3897/zookeys.150.2109
  2. Bentham, G. (1845) Plantae Hartwegianas Imprimis Mexicanas. 393 pp. https://doi.org/10.5962/bhl.title.437
  3. Funk, V.A. (1997) Xenophyllum, a New Andean Genus Extracted from Werneria s.l. (Compositae: Senecioneae). Novon A Journal For Botanical Nomenclature 7 (3): 235. https://doi.org/10.2307/3391934
  4. Hickey, M. & King, C. (2000) The Cambridge Illustrated Glossary of Botanical Terms. Cambridge University Press, 208 pp. https://doi.org/10.1006/anbo.2001.1472
  5. Iamonico, D. (2013) Taxonomical and chorological study on the central Mediterranean Basin endemic Arenaria bertolonii Fiori & Paol. (Caryophyllaceae). Plant Biosystems - An International Journal Dealing with All Aspects of Plant Biology 147 (4): 923–930. https://doi.org/10.1080/11263504.2012.753956
  6. Iamonico, D. (2014) Arenaria tenuifolia versus Arenaria hybrida (Caryophyllaceae): Nomenclatural study and taxonomic implications. Phytotaxa 173 (3): 235–240. https://doi.org/10.11646/phytotaxa.173.3.6
  7. Iamonico, D. (2016) Nomenclatural notes on four Linnaean names in Arenaria (Caryophyllaceae). Taxon 65 (3): 610–616. https://doi.org/10.12705/653.13
  8. Iamonico, D. (2022) Notas nomenclaturales sobre el género Arenaria (Caryophyllaceae) en Chile. Darwiniana 10 (1): 187–192. https://doi.org/10.14522/darwiniana.2022.101.967
  9. IUCN (2012) IUCN Red List Categories and Criteria: Version 3.1.2. IUCN Species Survival Commission (Ed.) IUCN, 42 pp. https://doi.org/10.2305/iucn.ch.2020.05.en
  10. Jørgensen, P.M. & León-Yánez, S. (Eds.) (1999) Catalogue of the vascular plants of Ecuador. Monographs in Systematic Botany from the Missouri Botanical Garden 75: 1–1181.
  11. Kunth, C.S. (1823) Nova genera et species plantarum: quas in peregrinatione ad plagam aequinoctialem orbis novi collegerunt / descripserunt, partim adumbraverunt Amat. Bonpland et Alex. de Humboldt; ex schedis autographis Amati Bonplandi in ordinem digessit Carol. Sigismund Kunth. Ex officina Christophori Plantini, Paris, 542 pp. https://doi.org/10.5962/bhl.title.640
  12. León-Yánez, S., Valencia, R., Pitmam, N., Endara, L., Ulloa Ulloa, C. & Navarrete, H. (Eds.) (2011) Libro Rojo de Plantas Endémicas del Ecuador. Publicaciones del Herbario QCA, Pontificia Universidad Católica del Ecuador, Quito, 440 pp. https://doi.org/10.17163/abyaups.112.941
  13. Linneaeus, C. (1753a) Species plantarum, vol. 1. Laurentii Salvii, Holmiae, 560 pp. https://doi.org/10.5962/bhl.title.669
  14. Linneaeus, C. (1753b) Species plantarum, vol. 2. Laurentii Salvii, Holmiae, 1200 pp. https://doi.org/10.5962/bhl.title.669
  15. Liu, L., Qiang, X.-J., Huang, F., Huang, X.-Z. & Yu, Y.-L. (2025) Stellaria yabulaiensis (Caryophyllaceae), a new species from Inner Mongolia, China. PhytoKeys 259: 103–109. https://doi.org/10.3897/phytokeys.259.150512
  16. Montesinos, D. & Kool, A. (2015) Arenaria acaulis (Caryophyllaceae), a new species from South Peru. Phytotaxa 220 (1): 77–82. https://doi.org/10.11646/phytotaxa.220.1.7
  17. Montesinos-Tubée, D. & Teillier, S. (2022) Arenaria L. (Caryophyllaceae) en Chile. Gayana Botánica 79 (2): 124–139. https://doi.org/10.4067/S0717-66432022000200124
  18. Montesinos-Tubée, D.B. & Iamonico, D. (2023) Neotypification for five names linked to Arenaria (Caryophyllaceae) for the endemic flora of Peru and Bolivia. PhytoKeys 230: 131–144. https://doi.org/10.3897/phytokeys.230.107263
  19. Montesinos-Tubée, D. & Borsch, T. (2023) Molecular phylogenetics and morphology reveal the Plettkea lineage including several members of Arenaria and Pycnophyllopsis to be a clade of 21 South American species nested within Stellaria (Caryophyllaceae, Alsineae). Willdenowia 53 (3): 115–148. https://doi.org/10.3372/wi.53.53301
  20. POWO (2026) Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. Available from: https://powo.science.kew.org/ (accessed 7 April 2026)
  21. Röemer, J.J., Schultes, J.A., Schultes, J.H., Sprengel, K. & Cotta, J.G. (1819) Caroli a Linné ... Systema vegetabilium :secundum classes, ordines, genera, species. Cum characteribus, differentiis et synonymiis. Sumtibus J.G. Cottae, 632 pp. https://doi.org/10.5962/bhl.title.825
  22. Rohrbach, P. (1872a) Beiträge zur Systematik der Caryophyllinen. Linnaea 37 (3): 267.
  23. Rohrbach, P. (1872b) Tropaeolaceae, Molluginaceae, Alsinaceae, Silenaceae, Portulacaceae, Ficoidaceae, Elatinaceae. In: Martius, C.F. & Eichler, A. (Eds.) Flora Brasiliensis 14 (2). pp. 221–323.
  24. Schlechtendal, D.F.K. (1816) Über die Stelarien und Arenarien Arten, welche in der Willdenowschen Pflanzensammlung aufbewahrt werden. Magazin für die neuesten Entdeckungen in der gesammten Naturkunde, Gesellschaft Naturforschender Freunde zu Berlin 7 (3): 190–213. https://doi.org/10.1515/9783112446485
  25. Sklenář, P., Luteyn, J.L., Ulloa-Ulloa, C., Jørgensen, P.M. & Dillon, M.O. (2005) Flora genérica de los páramos: Guía ilustrada de las plantas vasculares. New York Botanical Garden, New York, 499 pp. https://doi.org/10.1086/523148
  26. Stearn, W.T. (1986) Botanical Latin: History, grammar, Syntax, Terminology and Vocabulary (Ed 3). David and Charles Publishers plc, Great Britain, 555 pp.
  27. Thiers, B.M. (2026+) Index Herbariorum: a global directory of public herbaria and associated staff. New York Botanical Garden’s Virtual Herbarium. Available from: https://sweetgum.nybg.org/science/ih/ (accessed 7 April 2026)
  28. Tropicos (2026) Tropicos. Missouri Botanical Garden. Available from: http://www.tropicos.org (accessed 7 April 2026)
  29. Trujillo, E.J.T. & Muriel, P. (2025a) Nomenclatural notes in Arenaria (Caryophyllaceae) from the Páramos of Ecuador. Journal of the Botanical Research Institute of Texas 19 (4): 607–610. https://doi.org/10.17348/jbrit.v19.i4.1444
  30. Trujillo, E.J.T. & Muriel, P. (2025b) Arenaria nana is the correct name instead of A. muscoides (Caryophyllaceae) for a Critically Endangered endemic species of Ecuador. Phytotaxa 736 (2): 183–186. https://doi.org/10.11646/phytotaxa.736.2.7
  31. Turland, N.J., Wiersema, J.H., Barrie, F.R., Gandhi, K.N., Gravendyck, J., Greuter, W., Hawksworth, D.L., Herendeen, P.S., Klopper, R.R., Knapp, S., Kusber, W.-H., Li, D.-Z., May, T.W., Monro, A.M., Prado, J., Price, M.J., Smith, G.F. & Zamora Señoret, J.C. (Eds.) (2025) International Code of Nomenclature for algae, fungi, and plants (Madrid Code). University of Chicago Press, Chicago, 344 pp. https://doi.org/10.7208/chicago/9780226839479.001.0001
  32. Ulloa-Ulloa, C., Acevedo-Rodríguez, P., Beck, S., Belgrano, M.J., Bernal, R., Berry, P.E., Brako, L., Celis, M., Davidse, G., Forzza, R.C., Gradstein, S.R., Hokche, O., León, B., León-Yánez, S., Magill, R.E., Neill, D.A., Nee, M., Raven, P.H., Stimmel, H., Strong, M.T., Villaseñor, J.L., Zarucchi, J.L., Zuloaga, F.O. & Jørgensen, P.M. (2018 onwards) Vascular Plants of the Americas (VPA). Tropicos, Missouri Botanical Garden, St. Louis, Missouri, USA. Available from: http://www.tropicos.org/Project/VPA (accessed 20 November 2025) https://doi.org/10.1126/science.aao0398
  33. Weddell, H.A. (1864) Plantes inédites des Andes. Annales des Sciences Naturelle Botanique, sér. 5: 283–296.
  34. WFO (2026) World Flora Online. Available from: http://www.worldfloraonline.org (accessed 7 April 2026)
  35. Williams, F.N. (1898) A Revision of the genus Arenaria L. Journal of the Linnean Society of London, Botany 33: 326–437. https://doi.org/10.1111/j.1095-8339.1898.tb00290.x

How to Cite

Trujillo, E.J., Romoleroux, K. & Muriel, P. (2026) Arenaria radians as a synonym of Arenaria dicranoides (Caryophyllaceae): morphological insights with additional notes. Phytotaxa 752 (3): 209–218. https://doi.org/10.11646/phytotaxa.752.3.3