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Karwinskia humboldtiana

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Species of shrub

Karwinskia humboldtiana
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Rhamnaceae
Genus: Karwinskia
Species: K. humboldtiana
Binomial name
Karwinskia humboldtiana
(Schult.) Zucc.
Synonyms

Rhamnus humboldtiana Schult.

Karwinskia humboldtiana, commonly known as coyotillo, cacachila or Humboldt coyotillo, is a species of flowering shrub or small tree in the family Rhamnaceae. It is native to southern and western Texas in the United States as well as much of Mexico. The seeds and leaves of this plant contain the quinones eleutherin and 7-methoxyeleutherin and chrysophanol and β-amyrin in the fruits that are toxic to humans and livestock. The toxins typically induce paralysis, which is often followed by death. However, it often takes days or even weeks after consumption for the symptoms to manifest.

References

  1. ^ "Karwinskia humboldtiana". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 2009-12-02.
  2. "Coyotillo, Humboldt Coyotillo, Tullidora, Capulincillo, Capulincillo Cimmaron, Capulin, Palo Negrito, Margarita, Cacachila, China, Frutillo Negrito, Cochila, Margarita del Cero (Karwinskia humboldtiana)". Texas Native Shrubs. Texas A&M University. Retrieved 2009-09-23.
  3. Antimicrobial agents from higher plants: two dimethylbenzisochromans from Karwinskia humboldtiana. Lester A. Mitscher, Sitaraghav R. Gollapudi, David S. Oburn and Steven Drake, Phytochemistry, Volume 24, Issue 8, 1985, Pages 1681-1683, doi:10.1016/S0031-9422(00)82534-0
  4. Chrysophanol and β-amyrin in the fruits of Karwinskia humboldtiana. Xorge Alejandro Domínguez and Leticia Garza, Phytochemistry, Volume 11, Issue 3, March 1972, Page 1186, doi:10.1016/S0031-9422(00)88492-7
  5. "Coyotillo". Texas AgriLife Research and Extension at Uvalde. Texas A&M University System. 2000. Archived from the original on 2010-11-26. Retrieved 2009-09-23.
  6. Stewart, Amy (2009). Wicked Plants. New York: Algonquin Books of Chapel Hill. p. 25. ISBN 9781565126831.
Taxon identifiers
Karwinskia humboldtiana
Rhamnus humboldtiana


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