One paper has also inquired into the role which catalog sales of seeds and plants may have played in the dissemination of invasive plants. It has been found that "P. crassipes" was offered in the 1884 issue of Bordentown, New Jersey-based Edmund D. Sturtevant's "Catalogue of rare water lilies and other choice aquatic plants", and of Germany has offered the plant since 1864 (since the firm was founded). By 1895, it was offered by seed-purveyors in the states of NJ, NY, California, and Florida.