National Geographic : 1925 May
THE NATIONAI. GEOGRAPHIC MAGAZINE Fronds somewhat reduced @ Painting by E. J . Geske SENSITIVE FERN (Onoclea sensibilis) A normal fertile and a sterile frond, the latter smaller than usual. Two distended berry like fertile segments containing the sporangia are shown below, magnified so times, and a single ripe sporangium, magnified 60 times.