Equisetopsida (Horsetailes)

Equisetopsida, or Sphenopsida, is a class of plants with a fossil record going back to the Devonian. They are commonly known as horsetails. Living species typically grow in wet areas, with needle-like leaves radiating at regular intervals from a single vertical stem. The Equisetopsida were formerly regarded as a separate division of spore plants and also called Equisetophyta, Arthrophyta or Sphenophyta; today they have been recognized as rather close relatives of the typical ferns (Pteridopsida) and form a specialized lineage of the Pteridophyta.

Source: http://en.wikipedia.org/wiki/Equisetopsida

Annularia stellata

Inv. no.	ZŠ317
Taxonomy	Oddělení: Pteridophyta / Třída: Equisetopsida / Rod: Annularia / Druh: stellata
Description
Lithostratigraphy	kladenské souvrství - nýřanské vrstvy
Locality	Dobřany - Důl Dobré štěstí List ofxhibits on this locality

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Annularia stellata

Virtual museum of the Czech Geological Survey, www.geology.cz, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]