owl claws


Hymenoxys (Rubberweed or Bitterweed) is a genus of the botanical family Asteraceae. Plants of this genus are toxic to sheep due to the presence of the sesquiterpene lactone hymenoxon. There are 28 species.

Species include:

External links

Further reading

  • Everitt, J.H.; Lonard, R.L., Little, C.R. (2007). Weeds in South Texas and Northern Mexico. Lubbock: Texas Tech University Press. ISBN 0-89672-614-2
  • Pfeiffer, F. A. and M. C. Calhoun. (1987). Effects of environmental, site, and phenological factors on hymenoxon content of bitterweed, Hymenoxys odorata. Journal of Animal Science 65 1553-62.

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