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1 October 2006 Phylogeny and Biogeography of Pomaria (Caesalpinioideae: Leguminosae)
Beryl Simpson, Leah Larkin, Andrea Weeks, Joshua McDill
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Abstract

Pomaria, traditionally placed in Hoffmannseggia or Caesalpinia, is shown to be a well-supported group of 15 species related to the Erythrostemon group of Caesalpinia sensu lato. Monophyly is well supported by analyses of both nuclear and chloroplast DNA data and by the presence of several unique morphological characters. Nine species of the genus are distributed in the arid and montane regions of the southwestern United States and adjacent Mexico, three species occur in temperate eastern South America, and three species are native to southern Africa. The genus thus exhibits both a New World amphitropical and a New World-African amphi-Atlantic distribution pattern. A biogeographical analysis suggests two dispersals within the genus account for the present distribution: one from North America to Africa and second from North America to South America.

Beryl Simpson, Leah Larkin, Andrea Weeks, and Joshua McDill "Phylogeny and Biogeography of Pomaria (Caesalpinioideae: Leguminosae)," Systematic Botany 31(4), 792-804, (1 October 2006). https://doi.org/10.1600/036364406779695915
Published: 1 October 2006
JOURNAL ARTICLE
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KEYWORDS
amphi-Atlantic
amphitropical
Caesalpinia
Hoffmannseggia
Leguminosae
Pomaria
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