Noun | 1. | Osmundaceae - large family of ferns widely distributed in temperate and tropical areas genus Osmunda - type genus of the Osmundaceae genus Leptopteris, Leptopteris - including some ferns sometimes placed in genus Todea genus Todea, Todea - a genus of delicate ferns belonging to the family Osmundaceae fern family - families of ferns and fern allies |