The seeds of the cryptogams or flowerless plants are not true seeds and are properly designated "spores."
Each class of flowerless or cryptogamic plants requires special treatment for the herbarium.
Summer sees the lotus (renge) convert wide expanses of lake and river into sheets of white and red blossoms; a comparatively flowerless interval ensues until, in October and November, the chrysanthemum arrives to furnish an excuse for fashionable gatherings.
He separated flowering from flowerless plants, and divided the former into Dicotyledons and Monocotyledons.
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.