1515. The asexuals cease in the process of vegetation, where the other plants begin. With the rupture of the gemmal-or bud-vesicle in the higher plants a new world for the first time emerges into view, such as stem, leaves, blossom, and then the ultimate bud ruptures for the first time as the pericarp, and scatters its higher organized germinal powder as true seeds. 1516. An asexual plant is one, which, without all the intermediate organs of the stem, at once represents the capsule or ovary. It consists only of the beginning and end of the plant. 1517. The higher plants differ from the lower by the interposition of new organs between the two terminal organs, namely, the primary vesicle and the true seed. It may be said, that the asexual plant is naught but seed, and that the seed of the higher plants is a fungus upon a leafy peduncle, a fungus more highly organized by light. 1518. The asexual plants have no true root, stalk, and leaf; they have not even a true bark, liber, and wood, in so far as these first make their appearance through separation. Tracheæ are first exhibited in the higher ferns, and then only as constituting a single string, which occupies the middle of the plant, and consequently forms no circle or zone. 1519. As again the true seed is a leaf-formation, and possesses therefore cotyledons or seed-lobes, such seeds must be wanting in the asexual plants; they are therefore Acotyledones. From the same cause, however, the germinal leaves or plumula must be also wanting; they are therefore germless, or anembryonic. 1520. The farinaceous or granular matter, lying next to the germ when within the shell of the true seeds, is called the _albumen_ or perisperm; the seeds of the asexual plants are therefore nothing else but albumen. They are therefore devoid of the funiculus or, what has been called, umbilical cord. 1521. The involucre, wherein, in true seeds, the germ and albumen are found, is the seed-coat or testa; consequently what has been called the capsule of the asexual plants (of mosses and ferns) corresponds simply to this spermoderm or seed-covering, and is no true ovarium. The capsules of mosses and ferns are therefore seeds full of albuminous dust. 1522. If any of these be regarded as a capsule, it can be the _calyptra_ of the mosses. This, too, is probably nothing else than the external testa; the proper capsule being its internal coat. 1523. The _indusium_ of ferns incloses several capsules as they have been called, or properly seeds, and might therefore, if considered alone, be compared with an ovarium, but it is probably none other than the covering corresponding to the perichoetium that surrounds the base of the setæ in mosses. The sorus is an accumulation of seeds with pulverulent albumen contained in a membranaceous covering, the indusium. 1524. The life of the asexual plants consists simply in the galvanic process. They are the primary organisms, planted in air.