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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
Sphenophyllum cuneifolium ZŠ839
Sphenophyllum emarginatum ZŠ410
Sphenophyllum emarginatum ZŠ316
Sphenophyllum emarginatum ZŠ399
Sphenophyllum emarginatum ZŠ42
Sphenophyllum emarginatumŠimůnek (1994), Pl. I, fig. 4 ZŠ40
Sphenophyllum miriophyllum WA132
Sphenophyllum miriophyllum WA52
Sphenophyllum myriophillum WA135
Sphenophyllum myriophyllum ZŠ600
Sphenophyllum myriophyllum ZŠ613
Sphenophyllum myriophyllum ZŠ607
Sphenophyllum myriophyllum WA136
Sphenophyllum oblongifolium ZŠ333
Sphenophyllum oblongifolium ZŠ327
Sphenophyllum oblongifolium WA204
Sphenophyllum oblongifolium ZŠ321
Sphenophyllum oblongifolium ZŠ343
Sphenophyllum oblongifolium ZŠ328
Sphenophyllum WA174

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