Crossword clues for Fern spores. 4 letters:SORIFern spores.SORIFerns' spore casesSORIFern spore clustersSORIFern spore-class clustersSORISpore clusters on ferns.SORISpore cases on ferns.SORISpore cases on a fern frond.SORISpore cases on a fern.ASEXUALLike fern sporesSORALPertaining to fern spores.SORALOf a fern spore.SORUSSpore cluster of a fern