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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Ferns' spore cases 4 letters:

SORI: Ferns' spore cases
SORI: Spore cases on ferns.
SORI: Spore cases on a fern frond.
SORI: Spore cases on a fern.