Portulaca

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Portulaca

Portulaca L., Sp. Pl.: 445. 1753 sec. Nyffeler & Eggli 20101
  • 1. 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
  • 2. POWO 2017+: Plants of the World Online. Facilitated by the Royal Botanic Gardens, Kew. – http://www.plantsoftheworldonline.org
  • =Lemia Vand., Fl. Lusit. Brasil. Spec. 35. 1788 syn. sec. Nyffeler & Eggli 20103
    • Type: not designated
  • 3. 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
  • 4. 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
  • –Merida Neck., Elem. Bot. 2: 382. 1790, nom. inval., syn. sec. Nyffeler & Eggli 20105
  • 5. 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
  • –Lamia Vand. ex Endl., Gen. Pl.: 949. 1839, nom. inval., syn. sec. Nyffeler & Eggli 20106
    • Type: not designated
  • 6. 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

Content

Notes

Although the circumscription of the genus has been relatively stable, the infrageneric classification remains controversial. Previous proposals (von Poellnitz 1934; Legrand 1958; Geesink 1969) are only in part consistent with the results of a recent phylogenetic analysis (Ocampo & Columbus 2012). The genus is monophyletic and has two main lineages: one whose members have opposite leaves (OL clade) and that are distributed in Africa, Asia, and Australia (except P. quadrifida L., which is a pantropical weed), and a second one whose species have alternate to subopposite leaves (AL clade) and are more widespread and originated in the New World. These major clades and their subclades have anatomical and morphological features (Ocampo & Columbus 2012; Ocampo & al. 2013) that will be used to amend the classification of Portulaca.A,B,C,D,E,F

Bibliography

A. Geesink, R. 1969: An account of the genus Portulaca in Indo-Australia and the Pacific. – Blumea 17: 275 – 301
B. Hernández-Ledesma, P., Berendsohn, W. G., Borsch, T., von Mering, S., Akhani, H., Arias, S., Castañeda-Noa, I., Eggli, U., Eriksson, R., Flores-Olvera, H., Fuentes-Bazán, S., Kadereit, G., Klak, C., Korotkova, N., Nyffeler, R., Ocampo, G. & Ochoterena, H. 2015: A taxonomic backbone for the global synthesis of species diversity in the angiosperm order Caryophyllales. – Willdenowia 45(3): 281-383. http://doi.org/10.3372/wi.45.45301
C. Legrand, D. 1958: Desmembración del género Portulaca II. – Comunicaciones Botanicas del Museo de Historia Natural de Montevideo 3: 1-17
D. Ocampo, G. & Columbus, J. T. 2012: Molecular phylogenetics, historical biogeography, and chromosome evolution of Portulaca (Portulacaceae). – Molecular Phylogenetics and Evolution 63: 97 – 112. http://doi.org/10.1016/j.ympev.2011.12.017
E. Ocampo, G., Koteyeva, N. K., Voznesenskaya, E., Edwards, G. E., Sage, T. L., Sage, R. F. & Columbus, J. T. 2013: Evolution of leaf anatomy and photosynthetic pathways in Portulacaceae. – American Journal of Botany 100(12): 2388 – 2402. http://doi.org/10.3732/ajb.1300094
F. Poellnitz, K. 1934: Versuch einer Monographie der Gattung Portulaca L. – Feddes Repertorium Specierum Novarum Regni Vegetabilis 37: 240 – 320. http://doi.org/10.1002/FEDR.19340371403