n.formerly recognized taxonomic group including all flowerless and seedless plants that reproduce by means of spores: ferns, mosses, algae, fungi
英汉双解大词典
cryptogam/ˈkrɪptəʊˌɡæm/
1.
N（名词）
(in former plant classification schemes) any organism that does not produce seeds, including algae, fungi, mosses, and ferns (旧植物分类下的)隐花植物 → compare phanerogam