<plant biology> Of ferns, having sporangia with walls only one cell thick. ... Compare: eusporangiate. ... (09 Oct 1997) ... Found on http://www.encyclo.co.uk/local/20973
adjective (of ferns) having each sporangium formed from a single epidermal cell; `leptosporangiate ferns` Found on https://www.encyclo.co.uk/local/20974