Poinsettia's wild ancestor in the Mexican dry tropics: Historical, genetic, and environmental evidence.

  title={Poinsettia's wild ancestor in the Mexican dry tropics: Historical, genetic, and environmental evidence.},
  author={Laura Trejo and Teresa Patricia Feria Arroyo and Kenneth M. Olsen and Luis E. Eguiarte and Baruch Arroyo and Jennifer A. Gruhn and Mark E. Olson},
  journal={American journal of botany},
  volume={99 7},
PREMISE OF THE STUDY The poinsettia (Euphorbia pulcherrima) is the world's most economically important potted plant, but despite its preeminence it is not clear which wild populations are ancestral to the varieties cultivated around the world. Tradition holds that the U.S. envoy to Mexico J. R. Poinsett collected the progenitors of the over 300 varieties in global cultivation on an 1828 excursion to northern Guerrero State, Mexico. It is unknown whether the contemporary cultivars are descended… 

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