Alfred B. Rendle, Arthur G. Tansley, Joseph R. Green, Charles E. Moss, Harold W. T. Wager, Sydney H. Vines, and William T. Thiselton-Dyer, 1911 Encyclopædia Britannica (1911)
“ The plant world falls into two great divisions, the higher or flowering plants (Phanerogams) , characterized by the formation of a seed, and the lower or flowerless plants (Cryptogams) , in which no seed is formed but the plants are disseminated by means of unicellular bodies termed spores. The term Cryptogam is archaic, implying a hidden method of reproduction as compared with the obvious method represented by the flower of the Phanerogam; with the aid of a good microscope it is, however, easier to follow the process of fertilization in many Cryptogams than in the flowering plants. ”
