The seeds of the cryptogams or flowerless plants are not true seeds and are properly designated "spores."
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.
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.