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

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

  • F. Douglas Wilson


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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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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