Dryopteris filix-mas, enlarged approximately 550 times (Sporangium) / 850 times (Spore tetrad and germination). A sub-model shows a sporangium in the moment of opening. In addition to this, a spore tetrad and a spore germinating onto a prothallium are shown and enlarged to a greater extent. In one piece. On a stand with explanatory note on the green base. Related explanatory notes have been added to the base of the mold.
