Paris quadrifolia
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 636 volte

Paris quadrifolia
Jacob Sturm, Johann Georg Sturm - Deutschlands Flora in Abbildungen (1796). - This image is in the public domain because its copyright has expired. - Foto visualizzata 634 volte

Paris quadrifolia
Credit: Photo by Gianluca Nicolella - http://www.actaplantarum.org - Foto visualizzata 605 volte

Paris quadrifolia
C. Hoffmann - Botanischer Bilder-Atlas (1884) - This image is in the public domain because its copyright has expired. - Foto visualizzata 640 volte