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Equisetidae
3-432.00.00English: eusporangiate ferns; Horsetails and primitive ferns.
Name: Equisetanae; Equisetanae; Arthrophyta; Sphenophyta; Sphenopsida.
Clades: Equisetanae; Pteridophyta; Plants.
Habitat: wet areas.IntroductionEquisetidae have an emphasis on the Silicon series beside the quality of the Iron series.BotanyFerns; vascular plant; ± 410 million years old.
Stem: single; vertical.
Leaves: with a single vein; needle-like; radiating at regular intervals from the stem.
Reproduction: by spores; bear a protostele; having microphylls.TaxonomyEquisetidae, Equisetanae were formerly regarded as a separate division of spore plants. Today Equisetidae are seen as close relatives of and included in the typical ferns, Pteridopsida.Plant theoryIn the Plant theory Equisetidae is treated as a sublass in the class Equiseopsida, in the Phylum Pteridophyta. The similarity with Silicon series is strong. The other families are placed tentatively.Families1. Psilotaceae: only Family in Pislotales; Whisk ferns; 2 genera, Psilotum, Tmesipteris.
4. Equisetaceae: only Family in Equisetales; 1 genus: Equisetum.
5. Marattiaceae: only Family in Marattiales; 6 genera, Angiopteris, Christensenia, Danaea, Marattia, Eupodium, Ptisana.
7. Ophioglossaceae: only Family in Ophioglossales; 4 genera, Ophioglossum, Botrychium, Helminthostachys, Mankyua.
Name: Equisetanae; Equisetanae; Arthrophyta; Sphenophyta; Sphenopsida.
Clades: Equisetanae; Pteridophyta; Plants.
Habitat: wet areas.IntroductionEquisetidae have an emphasis on the Silicon series beside the quality of the Iron series.BotanyFerns; vascular plant; ± 410 million years old.
Stem: single; vertical.
Leaves: with a single vein; needle-like; radiating at regular intervals from the stem.
Reproduction: by spores; bear a protostele; having microphylls.TaxonomyEquisetidae, Equisetanae were formerly regarded as a separate division of spore plants. Today Equisetidae are seen as close relatives of and included in the typical ferns, Pteridopsida.Plant theoryIn the Plant theory Equisetidae is treated as a sublass in the class Equiseopsida, in the Phylum Pteridophyta. The similarity with Silicon series is strong. The other families are placed tentatively.Families1. Psilotaceae: only Family in Pislotales; Whisk ferns; 2 genera, Psilotum, Tmesipteris.
4. Equisetaceae: only Family in Equisetales; 1 genus: Equisetum.
5. Marattiaceae: only Family in Marattiales; 6 genera, Angiopteris, Christensenia, Danaea, Marattia, Eupodium, Ptisana.
7. Ophioglossaceae: only Family in Ophioglossales; 4 genera, Ophioglossum, Botrychium, Helminthostachys, Mankyua.