The Collaborative International Dictionary
Pteridomania
Pteridomania \Pter`i*do*ma"ni*a\, n. [Gr. ?, ?, a fern + E.
mania.]
A madness, craze, or strong fancy, for ferns. [R.]
--C.
Kingsley.
Wiktionary
pteridomania
n. A craze, in 19th-century England, for collecting ferns and for using images of ferns in the decorative arts
Wikipedia
Pteridomania
Pteridomania or Fern-Fever was a craze for ferns. Victorian decorative arts presented the fern motif in pottery, glass, metal, textiles, wood, printed paper, and sculpture, with ferns "appearing on everything from christening presents to gravestones and memorials".