On the identity of two Mexican species of Ageratina (Eupatorieae, Asteraceae): A. grandifolia and A. rivalis

Keywords: lectotype designation, invasive plants, medicinal plants, ornamental plants, taxonomy

Abstract

Background: Ageratina, with 167 species, constitutes the most diverse genus of the Mexican Asteraceae and the sixth most diverse of the vascular plants in Mexico. The taxonomy of the genus is complex, due to its number of species and the numerous inadequately delimited taxa or with intricate and confusing nomenclature. In addition, little known species have sometimes remained under the synonymy of another different species, as in the case of A. rivalis, which has been considered as a synonym of A. grandifolia.

Question: Is it possible to recognize Ageratina rivalis as a distinct species of A. grandifolia by critically analyzing its circumscription, nomenclature and geographical distribution?

Taxon: Ageratina grandifolia and A. rivalis.

Study site: Mexico.

Method: A thorough review of herbarium specimens, field material, descriptions and geographic distribution of the species was made to contrast them.

Results: Several differences exist in the morphology and geographical distribution of Ageratina rivalis and A. grandifolia. Descriptions, pictures, distribution maps, synonymy and a key to distinguish them from similar species are provided. The presence of A. grandifolia in Mexico City is also documented. Lectotypes are designated for Eupatorium conspicuum, E. conspicuum var. pueblense, E. grandifolium, and E. rivale.

Conclusions: Morphology and geography support the distinction between A. grandifolia and A. rivalis. However, further research is desirable to corroborate or refute this statement, and especially to clearly circumscribe several similar species that seem to be related. This work contributes to a better understanding of the taxonomy and biogeography of the genus Ageratina in Mexico.

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Author Biography

Oscar Hinojosa-Espinosa, Universidad Nacional Autónoma de México

Técnico Académico

Departamento de Botánica

Instituto de Biología, UNAM

On the identity of two Mexican species of <em>Ageratina</em> (Eupatorieae, Asteraceae): <em>A. grandifolia</em> and <em>A. rivalis</em>

References

Bremer K, Anderberg AA, Karis PO, Lundberg J. 1994. Eupatorieae. In: Bremer K, ed. Asteraceae, Cladistics and Classification. Portland, USA: Timber Press, 625–680.

Céspedes L, Ortiz E, Villaseñor J.L. 2018. La familia Asteraceae en la Reserva Ecológica del Pedregal de San Ángel, Ciudad de México, México. Revista Mexicana de Biodiversidad 89: 193-207. DOI: http://dx.doi.org/10.22201/ib.20078706e.2018.1.2203

García-Sánchez E, Ramírez-López CB, Martínez-Muñoz RE, Flores-García A, Del Río RE. Martínez-Pacheco MM. 2015. Antibacterial activity of some medicinal Eupatorium species against antibiotic resistant pathogenic bacteria. Polibotánica 39: 91-101.

Global Plants. 2018. <https://plants.jstor.org/> (Last accessed: September 2018)

Espinosa J. 2001. Eupatorium. In: Rzedowski GC de, Rzedowski J, eds. Flora fanerogámica del Valle México. Pátzcuaro, Michoacán, México: Instituto de Ecología y Comisión Nacional para el Conocimiento y Uso de la Biodiversidad, 786–800. <https://www.biodiversidad.gob.mx/publicaciones/librosDig/pdf/Flora_del_Valle_de_Mx1.pdf>

Ito M, Yahara T, King RM, Watanabe K, Oshita S, Yokoyama J, Crawford DJ. 2000. Molecular phylogeny of Eupatorieae (Asteraceae) estimated from cpDNA RFLP and its implication for the polyploid origin hypothesis of the tribe. Journal of Plant Research 113: 91–96. DOI: https://doi.org/10.1007/PL00013919

King RM, Robinson H. 1970. Studies in the Eupatorieae (Compositae). XIX. New combinations in Ageratina. Phytologia 19: 208–229.

King RM, Robinson H. 1987. The genera of the Eupatorieae (Asteraceae). Sant Louis Missouri: Missouri Botanical Garden Press.

McVaugh R. 1984. Flora Fovo-Galiciana. A descriptive account of the vascular plants of Western Mexico, Vol. 12 Compositae. Ann Harbor, Michigan: The University of Michigan Press.

Pruski JF, Robinson H. 2018. Asteraceae. In: Davidse G, Sousa-Sánchez M, Knapp S, Chiang-Cabrera F, eds. Flora Mesoamericana. Sant Louis Missouri: Missouri Botanical Garden Press.

Robinson BL. 1923. Records preliminary to a general treatment of the Eupatorieae,—III. Contributions from the Gray Herbarium 68: 3–43. https://www.jstor.org/stable/41756107

Romero-Cerecero O, Zamilpa-Álvarez A, Jiménez-Ferrer E, Tortoriello J. 2012. Exploratory study on the effectiveness of a standardized extract from Ageratina pichinchensis in patients with chronic venous leg ulcers. Planta Medica 78: 304-310. DOI: https://doi.org/10.1055/s-0031-1280448

Turner BL. 1997. The Compositae of Mexico. A systematic account of the family Asteraceae, volume 1. Eupatorieae. Phytologia Memoirs 11: 1–272.

Turner BL. 2006. Three New Species of Ageratina (Asteraceae: Eupatorieae) from Oaxaca, Mexico and a key to the A. mairetiana Complex. Lundellia 9:1–6. DOI: https://doi.org/10.25224/1097-993X-9.1.1

Turner BL. 2007. Two new species of Ageratina (Asteraceae: Eupatorieae) from Mexico. Phytologia 89: 193–197.

Turner BL. 2008. Seven new species of Ageratina (Asteraceae, Eupatorieae) from Mexico. Phytologia 90: 358–375.

Turner BL. 2012. A new species of Ageratina (Asteraceae: Eupatorieae) from Sinaloa, Mexico. Phytoneuron 91: 1–4. http://www.phytoneuron.net/91PhytoN-Ageratinaconcordiana.pdf

Robinson H, Schilling EE, Panero JL. 2009. Eupatorieae. In: Funk VA, Sussana A, Stuessy TF, Bayer RJ, eds. Systematics, Evolution and Biogeography of the Compositae. Vienna: International Association for Plant Taxonomy, 731–744.

Schilling EE, Panero JL, Cox PB. 1999. Chloroplast DNA restriction site data support a narrowed interpretation of Eupatorium (Asteraceae). Plant Systematics and Evolution 219: 209–223. DOI: https://doi.org/10.1007/BF00985580

Villaseñor JL. 2016. Checklist of the native vascular plants of Mexico. Revista Mexicana de Biodiversidad 87: 559–902. DOI: https://doi.org/10.1016/j.rmb.2016.06.017

Villaseñor JL. 2018. Diversidad y distribución de la familia Asteraceae en México. Botanical Sciences 96: 332–358. DOI: http://dx.doi.org/10.17129/botsci.1872

Weber E. 2017. Invasive Plant Species of the world: a reference guide to environmental weeds. Boston, Massachusetts: CAB International.

Published
2019-06-06
How to Cite
Hinojosa-Espinosa, O., Villaseñor, J. L., & Ortiz, E. (2019). On the identity of two Mexican species of <em>Ageratina</em> (Eupatorieae, Asteraceae): <em>A. grandifolia</em> and <em>A. rivalis</em&gt;. Botanical Sciences, 97(2), 250-259. https://doi.org/10.17129/botsci.2143
Section
TAXONOMY AND FLORISTICS / TAXONOMÍA Y FLORÍSTICA