Bennett, Keith (2017). Knautia arvensis (GPP280). Digitised palynological slide. In: Pollen Catalogue of the British Isles (Version 3, published 10/18/2017). Retrieved from globalpollenproject.org on 08/14/2022.
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Directly sampled from plant materialThe source plant and identification method is unknown. Please contact the curator of this reference collection for more information.
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