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

Calamostachys		WA87
Calamostachys		WA59
Calamostachys		WA27
Calamostachys		WA21
Calamostachys		WA25
Calamostachys		WA22
Calamostachys tuberculata		WA30
Calamostachys tuberculata	Šimůnek (1994), Pl. I, fig. 9, 9a	ZŠ44
Calamostachys tuberculata		WA147
Calamostachys tuberculata		WA301
Calamostachys tuberculata		WA34
Calamostachys tuberculata		WA151
Huttonia spicata		WA142
Macrostachya carinata		WA43
Macrostachya gracilis		WA160
Macrostachya gracilis		WA161
Macrostachya infundibuliformis		WA140
Metacalamostachys dumasii		ZŠ716
Metacalamostachys dumasii	Šimůnek et al. (2017), Pl. 2, fig. 1	ZŠ625
Metacalamostachys dumasii		ZŠ715

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