Two closely related invasive Linaria species, Dalmatian toadflax and yellow toadflax, have successfully invaded a broad range of ecosystems throughout most of continental North America. The management challenge imposed by the landscape scale of many toadflax infestations, particularly in the West, is further complicated by hybridization between these two weeds. Herbicide and biological control treatments for invasive Linaria are highly species-specific, necessitating the development of a molecular diagnostic tool that can accurately confirm when cryptic hybridization has spontaneously occurred in the field, particularly in plants conforming to typical species appearance.
To learn more about this see the Science Spotlight: Looks aren’t everything: Hybridization between Dalmatian and yellow toadflax.
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