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Diversity of Seedless Vascular Plants
Division Lycophyta
21.3 Seedless Vascular Plants
Introduction to Plants
Sporophyte generation of lycophytes is dominant.
Reproductivestructures produce spores that are club-shaped or spike-shaped.
Lycopodium—wolf’s claw
Chapter 21
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Introduction to Plants
Two genera—Lycopodium and Selanginella
21.3 Seedless Vascular Plants
Chapter 21
Have roots, stems, and small, scaly, leaflike structures
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Division Pterophyta
Introduction to Plants
Plant division includes ferns and horsetails
Staghorn fern Hawaiian fern
Aquatic fern
Dryopteris
21.3 Seedless Vascular Plants
Chapter 21
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Sporophyte produces roots and a thick underground stem called a rhizome, a food-storage organ.
Introduction to Plants
The frond is part of the sporophyte generation of ferns.
21.3 Seedless Vascular Plants
Chapter 21
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Introduction to Plants
Fern spores form in a structure called a sporangium.
Clusters of sporangia form a sorus.
Sori usually are located on the undersides of fronds.
Bird’s nest fern
21.3 Seedless Vascular Plants
Chapter 21