Definition of potato fern in English:
potato fern
noun
1Australian A fern of the genus Marattia (the para or king fern).
2Any of several tropical South American ferns of the genus Solanopteris (family Polypodiaceae), the rhizomes of which contain specialized sacs that are inhabited by ants.
Origin
Late 19th century; earliest use found in Frederick Bailey (1827–1915).
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