<i>Equisetum x litorale</i> (<i>E. arvense</i> x <i>E. fluviatile</i>, Stängelquerschnitt (cross section)
Klaus van de Weyer; Dagmar Wassong
CC BY-SA 3.0
<a rel="nofollow" class="external free" href="https://species-id.net/openmedia/File:Equisetum_x_litorale_(E._arvense_x_E._fluviatile,_St%C3%A4ngelquerschnitt,_AquMakroph,_Dagmar_Wassong_2007).png">https://species-id.net/openmedia/File:Equisetum_x_litorale_(E._arvense_x_E._fluviatile,_St%C3%A4ngelquerschnitt,_AquMakroph,_Dagmar_Wassong_2007).png</a>