Plant Systematics and Evolution

, Volume 255, Issue 3–4, pp 121–143 | Cite as

Phylogenetic analysis of Sesuvioideae (Aizoaceae) inferred from nrDNA internal transcribed spacer (ITS) sequences and morphological data

  • N. S. Hassan
  • J. Thiede
  • S. Liede-SchumannEmail author


The phylogeny of the four genera of Aizoaceae subfamily Sesuvioideae (Sesuvium, Cypselea, Trianthema and Zaleya) is elucidated employing internal transcribed spacer (ITS) sequences and 23 morphological characters. Phylogenetic analysis based on ITS sequences and a combined molecular-morphological analysis provide largely congruent results. The monophyly of Sesuvioideae and its close relationship to Aizooideae s.l. and Mesembryanthemoideae is confirmed. Zaleya is placed within Trianthema and Cypselea within Sesuvium by ITS analysis, but in the combined analysis, Zaleya forms an unresolved polytomy with the two Trianthema clades and Cypselea, as well as two Sesuvium species, remain unresolved. Sesuvium sesuvioides and S. hydaspicum, previously treated as synonyms, are closely related, but molecular data do not support conspecifity. The Trianthema triquetra complex needs further intensive study because the African T. triquetra sample is closer to the NE African-Arabian T. sheilae than to Australian samples of T. triquetra. The close relationship of four species of Trianthema (T. patellitecta, T. rhynchocalyptra, T. megasperma, and T. pilosa) from Australia based on molecular data is supported morphologically by the exclusive possession of a well-developed indumentum in these taxa.


Aizoaceae Cypselea Evolution ITS Morphology Parsimony Sesuvioideae Sesuvium Trianthema Zaleya 


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Copyright information

© Springer-Verlag Wien 2005

Authors and Affiliations

  1. 1.Botany Department, Faculty of ScienceAssiut UniversityAssiutEgypt
  2. 2.Botanical Institute & GardenHamburg UniversityHamburgGermany
  3. 3.Department of Plant SystematicsUniversity of BayreuthBayreuthGermany
  4. 4.Biozentrum Klein Flottbek, Systemetik der pflanzenHamburg UniversityHamburgGermany

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