Osmunda regalis Robert H. Mohlenbrock USDA-NRCS PLANTS Database / USDA SCS. 1989. Midwest wetland flora: Field office illustrated guide to plant species. Midwest National Technical Center, Lincoln. - Not copyrighted image - Foto visualizzata 538 volte
| Osmunda regalis Credit: Photo by Renzo Salvo - Foto visualizzata 503 volte
| Osmunda regalis USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 1: 7. - Foto visualizzata 513 volte
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Osmunda regalis Hippolyte Coste - Flore descriptive et illustrée de la
France, de la Corse et des contrées limitrophes, 1901-1906 - This image is in
public domain because its copyright has expired. - Foto visualizzata 516 volte
| Osmunda regalis Credit: Photo by Renzo Salvo - Foto visualizzata 507 volte
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