Egeria densa
Credit: Photo by Enrico Romani - Foto visualizzata 478 volte

Elodea canadensis
Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Comune di Doberdò, lago., GO, FVG, Italia, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License - Foto visualizzata 1140 volte

Elodea nuttallii
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: 105. - Foto visualizzata 594 volte

Hydrocharis morsus-ranae
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 620 volte

Lagarosiphon major
Dipartimento di Scienze della Vita, Università di Trieste - Progetto Dryades - Picture by Andrea Moro - Comune di Ferrara, Orto Botanico, Centro Storico., FE, Emilia Romagna, Italia, - Image licensed under a Creative Commons Attribution Non Commercial Share-Alike 3.0 License - Foto visualizzata 335 volte

Najas gracillima
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: 90. - Foto visualizzata 351 volte

Najas major
Jacob Sturm, Johann Georg Sturm - Deutschlands Flora in Abbildungen (1796). - This image is in the public domain because its copyright has expired. - Foto visualizzata 259 volte

Najas marina
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: 89. - Foto visualizzata 458 volte

Najas marina subsp. marina
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 313 volte

Najas minor
USDA-NRCS PLANTS Database / USDA NRCS. Wetland flora: Field office illustrated guide to plant species. USDA Natural Resources Conservation Service. - Not copyrighted image - Foto visualizzata 362 volte

Stratiotes aloides
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 441 volte

Vallisneria americana
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: 106. - Foto visualizzata 255 volte

Vallisneria spiralis
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 544 volte