Horsetail Presentation

Horsetail Presentation - Horsetail Phylum: Pteridophyta...

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“Horsetail” Phylum: Pteridophyta Genus: Equisetum By: Jacqueline Aguilar and Sandra Lara
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History
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TAXONOMY Kingdom: Plantae Phylum: Pteridophyta Class: Equisetales Family: Equisetaceae Genus: Equisetum Species: E. hyemale
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History Seedless vascular plants that dominated the planet during the carboniferous period. (300-350 mya) Tree size horsetail fossils have been found on coal beds. Modern horsetail is shorter. Today only one genus remain: Equisetum and about 15species in the world restricted to moist places.
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Alternation of Generation
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Types of Horsetail Stem can be branched or un-branched
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Anatomy Independent sporophyte with true vascular tissue Sporophytes are ribbed, jointed stems Stems are hollow, contain silica deposits in epidermal cells Whorl of sacklike leaves at each stem node Leaves are one vein, united to form a sheeth around the stem, probably reduced megaphylls. Strobilus, cone like structure, bursts open
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Horsetail Presentation - Horsetail Phylum: Pteridophyta...

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