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Brittonia

, Volume 34, Issue 3, pp 290–293 | Cite as

A cytological basis for the separation of Geropogon from Tragopogon (Compositae: Lactuceae)

  • F. Douglas Wilson
Article

Abstract

The single species ofGeropogon, G. hybridus (L.) Schultz-Bip., is sometimes submerged in the morphologically similarTragopogon. A comparative study of the karyotypes ofGeropogon andTragopogon sensu stricto clarified their relationship. The karyotype ofG. hydridus (2n=14) was compared with that ofT. dubius Scop. (2n=12). The karyotypes are distinct, offering a compelling reason to recognizeGeropogon as a separate genus.

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Literature Cited

  1. Feinbrun-Dothan, N. 1978.Tragopogon. Pages 421–423.In: Flora Palaestina. Part Three. Israel Acad. Sci. and Human. Jerusalem.Google Scholar
  2. Fernandes, A. & M. Quieros. 1971. Contribution à la connaissance cytotaxonomique des Spermatophyta du Portugal. II. Compositae. Bol. Soc. Brot. (ser. 2): 45: 5–121.Google Scholar
  3. Matthews, V. A. 1975.Tragopogon. Pages 657–668.In: Flora of Furkey and the East Aegean Islands. Univ. of Edinburgh Press, Edinburgh, Scotland.Google Scholar
  4. Moore, R. J. 1977. Index to plant chromosome numbers 1973/74. Regnum Veg. 96.Google Scholar
  5. Ownbey, M. & G. B. McCollum. 1954. The chromosomes ofTragopogon. Rhodora 56: 7–21.Google Scholar
  6. Richardson, I. B. K. 1976.Tragopogon. Pages 322–325.In: T. G. Tutin et al., editors. Flora Europeae. Vol. 4. Cambridge Univ. Press, Cambridge, England.Google Scholar
  7. Stebbins, G. L., Jr. 1953. A new classification of the tribe Cichorieae, family Compositae. Madroño 12: 65–81.Google Scholar
  8. Winge, O. 1938. Inheritance of species characters inTragopogon: a cytogenetic investigation. Compt. Rend. Trav. Carlsberg Lab, Ser. Physiol. 22: 155–196.Google Scholar

Copyright information

© New York Botanical Garden 1982

Authors and Affiliations

  • F. Douglas Wilson
    • 1
  1. 1.USDA-ARS and Arizona Agr.Phoenix

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