Temporal distribution of European frog-bit PreservedSpecimen and HumanObservation records. 

  
  Part of: Hansen SE, Cahill BC, Hackett RA, Monfils MJ, Goebel RT, Asencio S, Monfils A (2022) Aggregated occurrence records of invasive European frog-bit (Hydrocharis morsus-ranae L.) across North America. Biodiversity Data Journal 10: e77492. https://doi.org/10.3897/BDJ.10.e77492