Recent molecular studies inform relationships among Cactaceae and early cactus evolution. Results of these studies are not uniform. Three topics are considered: (1) the phylogenetic position of Pereskia, (2) characters of the outgroups of Cactaceae, and (3) the character evolution implied thereby. If diminutive habit, succulence, and stem photosynthesis predate the Cactaceae, then character states in Pereskia may represent reversals.
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1 December 2008
Pereskia, Portulacaceae, Photosynthesis, and Phylogenies: Implications For Early Cactaceae
M Patrick Griffith
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Haseltonia
Vol. 2008 • No. 14
December 2008
Vol. 2008 • No. 14
December 2008
Cactaceae
cacti
character evolution
Pereskia
Portulacaceae