National Geographic : 1925 May
THE NATIONAL GEOGRAPHIC MAGAZINE Frond one-half natural size Paintin by . J. es V © Painting by E. J. Geske ROYAL FERN (Osmunda regalis) To the sportsman this swamp fern is familiar for its clear yellow locust-like foliage in autumn. The green spores have been shed months before, and the sporangia, too, have long since withered. A cluster of nearly empty sporangia is shown above, magnified 30 times, with a single spore at the right, magnified about 400 times.