Open Access Open Access  Restricted Access Subscription or Fee Access


A new perennial species of Portulaca (Portulacaceae) from central Mexico



Portulaca juliomartinezii is described here as a new species from the Mexican states of Guanajuato and Querétaro. It is a perennial species with fusiform roots, magenta flowers, and a hemispheric operculum, a set of characters that segregate it from other taxa like P. mexicana and P. pilosa. Although the molecular phylogenetic analysis is not clear about the sister relationships of P. juliomartinezii, the new species was found to be member of a high-supported clade within the Pilosa clade.


Guanajuato, phylogeny, Querétaro, xerophytic scrub, Eudicots

Full Text:



Cheng, T., Xu, C., Lei, L., Li, C., Zhang, Y. & Zhou, S. (2016) Barcoding the kingdom Plantae: new PCR primers for ITS regions of plants with improved universality and specificity. Molecular Ecology Resources 16: 138–149.

Doyle, J.J. & Doyle, J.L. (1987) A rapid DNA isolation procedure for small quantities of fresh leaf tissue. Phytochemical Bulletin 19: 11–15.

Edgar, R.C. (2004) MUSCLE: multiple sequence alignment with high accuracy and high throughput. Nucleic Acids Research 32: 1792–1797.

Geesink, R. (1969) An account of the genus Portulaca in Indo-Australia and the Pacific. Blumea 17: 275–301.

IUCN (2012) The IUCN red list of threatened species, version 2012.1. IUCN Red List Unit, Cambridge U.K. Available from: (accessed 22 December 2017)

Kumar, S., Stecher, G. & Tamura, K. (2016) MEGA7: Molecular Evolutionary Genetics Analysis version 7.0 for bigger datasets. Molecular Biology and Evolution 33: 1870–1874.

Legrand, D. (1958) Desmembración del género Portulaca II, adiciones y correcciones. Comunicaciones Botánicas del Museo de Historia Natural de Montevideo 3: 1–17.

Legrand, C.D. (1962) Las especies americanas de Portulaca. Anales del Museo Nacional de Historia Natural de Montevideo 7: 1–147.

Linnaeus, C. (1753) Species Plantarum, vol. 1. Laurentii Salvii, Holmia, 560 pp.

Nyffeler, R. & Eggli, U. (2010) Disintegrating Portulacaceae: a new familial classification of the suborder Portulacineae (Caryophyllales) based on molecular and morphological data. Taxon 59: 227–240.

Ocampo, G. (2003) Portulaca matthewsii (Portulacaceae), a new species from the “Sierra Gorda” Biosphere Reserve, Querétaro, Mexico. Sida 20: 1357–1361.

Ocampo, G. & Columbus, J.T. (2012) Molecular phylogenetics, historical biogeography, and chromosome number evolution in Portulaca (Portulacaceae). Molecular Phylogenetics and Evolution 63: 97–112.

Stamatakis, A. (2014) RAxML version 8: a tool for phylogenetic analysis and post-analysis of large phylogenies. Bioinformatics 30: 1312–1313.

Thiers, B. (2018) [continuously updated] Index herbariorum: A global directory of public herbaria and associated staff. New York Botanical Garden, Bronx, NY. Available from: (accessed 9 March 2018)

Villaseñor, J.L. (2016) Checklist of the native vascular plants of Mexico. Revista Mexicana de Biodiversidad 87: 559–902.

Wilson, P. (1928) Two new species of Portulaca from Mexico. Torreya 28: 28–29.


  • There are currently no refbacks.

ISSN 1179-3155 (print); ISSN 1179-3163 (online)

Published by Magnolia Press, Auckland, New Zealand