Data from: Herbarium specimens reveal a historical shift in phylogeographic structure of common ragweed during native range disturbance

Michael D. Martin, Elizabeth A. Zimmer, Morten T. Olsen, Andrew D. Foote, M. Thomas P. Gilbert & Grace S. Brush
Invasive plants provide ample opportunity to study evolutionary shifts that occur after introduction to novel environments. However, although genetic characters pre-dating introduction can be important determinants of later success, large-scale investigations of historical genetic structure have not been feasible. Common ragweed (Ambrosia artemisiifolia L.) is an invasive weed native to North America that is known for its allergenic pollen. Palynological records from sediment cores indicate that this species was uncommon before European colonization of North...
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