Divisions of the plant kingdom

Plants Bryophyta And Pteridophyta
Moss, Bryophyta
Division Hepatophyta

Ferns, Pteridophyta

Figure 4.2 Four multicellular plant divisions horsetail with horticultural significance

Horsetail, Equisetophyta moss, liverwort, fern,

Ferns, Pteridophyta

Figure 4.2 Four multicellular plant divisions horsetail with horticultural significance

Mosses and liverworts. Over 25 000 plant species which do not have a vascular system (see p92) are included in the divisions Bryophyta and Hepatophyta. They have distinctive vegetative and sexual reproductive structures, the latter producing spores that require damp conditions for survival. Many from both divisions are pioneer plants that play an important part in the early stages of soil formation. The low spreading carpets of vegetation also present a weed problem on the surface of compost in container-grown plants, on capillary benches and around glazing bars on greenhouse roofs.

Ferns and horsetails in the divisions Pteridophyta and Equisetophyta, have identifiable leaf, stem and root organs, but produce spores rather than seeds from the sexual reproduction process. Many species of ferns, e.g. maidenhair fern (Adiantum cuniatum), and some tropical horsetails, are grown for decorative purposes, but the common horsetail (Equisetum arvense), and bracken (Pteris aquilina) that spread by underground rhizomes are difficult weeds to control.

Seed-producing plants (Super-division -Spermatophyta) contain the most highly evolved and structurally complex plants. There are species adapted to most habitats and extremes of environment. Sexual reproduction produces a seed, which is a small, embryo plant contained within a protective layer.

Pteris Aquilina
Liverwort, Hepatophyta

Horsetail, Equisetophyta moss, liverwort, fern,

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Responses

  • klaudia
    What are the divisions of the plant kingdom?
    7 years ago

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