The commercial seed trade: An early disperser of weeds in the United States

@article{Mack2008TheCS,
  title={The commercial seed trade: An early disperser of weeds in the United States},
  author={Richard N. Mack},
  journal={Economic Botany},
  year={2008},
  volume={45},
  pages={257-273}
}
Seeds, bulbs, and cuttings of exotic plant species, including plants cultivated exclusively as ornamentals, were being advertised for sale in printed circulars in the United States by 1800. By the end of the 19th century seed trade catalogs were prolific and often listed dozens of exotic species that were already naturalized in the U.S. or new introductions from foreign suppliers. Among the species routinely offered for sale were many now considered noxious (e.g.,Berberis vulgaris, Eichhornia… Expand

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