ACOTYLEDONES  , the name given by

Antoine Laurent de Jussieu in 1789 to the lowest class in his Natural System of Botany, embracing flowerless plants, such as ferns, lycopods, horse-tails, mosses, liverworts, sea-weeds, lichens and fungi . The name is derived from the absence of a seed-leaf or cotyledon . Flowering plants bear a seed containing an embryo, with usually one or two cotyledons, or seed-leaves; while in flowerless plants there is no seed and therefore no true cotyledon . The term is synonymous with Cryptogams, by which it was replaced in later systems of classification .