The submersion of Pedilanthus into Euphorbia (Euphorbiaceae)

@article{Steinmann2003TheSO,
  title={The submersion of Pedilanthus into Euphorbia (Euphorbiaceae)},
  author={Victor W. Steinmann},
  journal={Acta Botanica Mexicana},
  year={2003},
  pages={45-50}
}
  • V. Steinmann
  • Published 1 October 2003
  • Biology
  • Acta Botanica Mexicana
Pedilanthus (Euphorbiaceae) consists of about 15 species, all of which occur in Mexico. The genus belongs to the tribe Euphorbieae subtribe Euphorbiinae in the subfamily Euphorbioideae, and is one of six satellite genera of Euphorbia. As traditionally suspected, molecular studies have demonstrated that Euphorbia is paraphyletic, and the satellite genera are nested within it. In order to create a classification of Euphorbieae subtribe Euphorbiinae that reflects evolutionary relationships and… 
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References

SHOWING 1-10 OF 14 REFERENCES
Phylogenetic Relationships in Euphorbieae (Euphorbiaceae) Based on ITS and ndhF Sequence Data
TLDR
Biogeographical patterns examined in light of the molecular evidence suggest that the tribe Euphorbieae arose in Africa, possibly before the breakup of Gondwanaland, at which time the major lineages of subtribe Euphorbiinae were already present.
Synopsis of the Genera and Suprageneric Taxa of Euphorbiaceae
TLDR
This revised synopsis of the taxa of Euphorbiaceae recognizes, and provides keys to, 5 subfamilies, 49 tribes, and 317 genera, and proposes two new tribes and four new subtribes.
Flora of Tropical East Africa
LoganiaceaeBy E. A. Bruce and J. Lewis. Edited by C. E. Hubbard and E. Milne-Redhead. Pp. 47. (London: Crown Agents for Overseas Governments and Administrations, 1960.) 4s.
The genus Pedilanthus (Euphorbiaceae)
  • R. L. Dressler
  • Contributions from the Gray Herbarium of Harvard University
  • 1957
The genera of Euphorbiaceae in the southeastern United States [prim.]
  • G. Webster
  • Environmental Science
    Journal of the Arnold Arboretum.
  • 1968
Linné's natürliche Pflanzenklasse Tricoccae
  • Abhandl. Königl. Preuss. Akad. Wiss. Berlin
Pedilanthus tithymaloides (L.) Poit. ssp. smallii (Millsp.) Dressler, Contr. Gray Herb
  • 1957
Pedilanthus tithymaloides (L.) Poit. ssp. angustifolius (Poit.) Dressler, Contr. Gray Herb
  • 1957
Sulphur 49. 1844). A new name is required because of the existence of Euphorbia marcrocarpa Boiss. & Buhse
    Studies of the Euphorbia species of the Chihuahuan desert region and adjacent areas
    • Wrightia
    • 1975
    ...
    ...