BOT 3: Ferns
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Transcript of BOT 3: Ferns
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Spore Bearing Vascular
Plants: Ferns tjmedina
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Division Pterophyta
• Class Pteropsida• Commonly known as Ferns• Over 10,000 species • Most abundant in the tropics • Generally grow in moist environments but
some species occur in dry habitats• Most species are terrestrial but some are
epiphytic and a few are aquatic.
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Division Pterophyta• Basic plant parts:
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frond
pinna
stipe
rachis
crozier
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Division Pterophyta
• With megaphylls- has more than one vein in its blade – Associated with the leaf gap and leaf trace
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Division Pterophyta
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Division Pterophyta
• Divided into four orders• Based on the organization of the reproductive
structures:– Order Filicales (produce sorus/sori)– Order Ophioglossales (produce strobilus)– Order Marattiales (sorus in synangia)– Order Salviniales (produce sporocarps)
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Division PterophytaOrder Genera
Order Filicales Nephrolepis
Asplenium
Adiantum
Hemigramma
Pteris
Microsorium
Drynaria
Lygodium
Diplazium
Order Ophioglossales Ophioglossum
Order Marattiales Marattia
Order Salviniales Azolla pinnata
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Order Filicales
• True ferns (produce sorus/sori)
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B
s
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Order Filicales
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stalk
sporessporangiumindusium
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Order Filicales
• Nephrolepis• Asplenium• Adiantum
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Order Filicales
• Hemigramma• Pteris• Microsorium
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Order Filicales
• Drynaria• Lygodium• Diplazium
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Order Ophioglossales
• Ophioglossum- dimorphic leaves
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Order Marattiales• Marattia (tree fern); with a vertical stem; with
sorus in synangia (fused sporangia)
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Order Salviniales• Azolla pinnata (mosquito fern); water ferns
that produce sporocarps
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Other information about ferns• Exhibit circinate vernation
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Other information about ferns• Fern stem and root cross sections
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References:
• www.botany.hawaii.edu• www.home.aone.net.au/~byzantium/ferns/
about.html• www.nhm.ac.uk/hosted_sites/bps/copy.html
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the end
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