cryptogam n 1: formerly recognized taxonomic group including all flowerless and seedless plants that reproduce by means of spores: ferns, mosses, algae, fungi
Cryptogam \Cryp"to*gam\ (kr?p"t?-g?m), n. [Cf. F. cryptogame. See {Cryptogamia}.] (Bot.) A plant belonging to the Cryptogamia. --Henslow. [1913 Webster]