Cladus: Eukaryota
Regnum: Plantae
Divisio: Magnoliophyta
Classis: Magnoliopsida
Ordo: Asterales
Familia: Asteraceae
Subfamilia: Asteroideae
Tribus: Helenieae
Genus: Hymenoxys
Species: H. cooperi - H. hoopesii - H. lemmonii - H. odorata - H. richardsonii - H. texana
Name
Hymenoxys Cass.
Vernacular names
Internationalization
English: Rubberweed
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:
* Hymenoxys acaulis - Lakeside daisy
* Hymenoxys ambigens - Pinaleno Mountain rubberweed
* Hymenoxys brachyactis - East View rubberweed
* Hymenoxys cooperi - Cooper's rubberweed
* Hymenoxys helenioides - intermountain rubberweed
* Hymenoxys hoopesii - owl claws
* Hymenoxys lemmonii - Lemmon's rubberweed
* Hymenoxys odorata - bitter rubberweed
* Hymenoxys quinquesquamata - rincon rubberweed
* Hymenoxys richardsonii - pingue rubberweed, Colorado rubberweed
* Hymenoxys subintegra - Arizona rubberweed
* Hymenoxys texana - prairie dawn
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.
