1. A sporangium formed from a single epidermal cell; characteristic of the Filicales or of almost all modern ferns

Type of: sporangium, spore case, spore sac

• cast around
• cast aside
• cast down
• cast of characters
• cast on
• cast out
• cast-iron
• cast-iron plant
• cast-off
• Castanea
• Castanea chrysophylla
• Castanea crenata
• Castanea dentata
• Castanea mollissima
• Castanea ozarkensis
• Castanea pumila
• Castanea sativa
• castanets
• Castanopsis
• Castanopsis chrysophylla
• Castanospermum
• castaway
• caste
• caste system
• casteless