Equisetidae
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Equisetidae is one of the four subclasses of Polypodiopsida, a group of vascular plants with a fossil record going back to the Devonian. They are commonly known as horsetails. They typically grow in w
Equisetum telmateia Fallätsche 20200526 2
Vegetative stem: N = node, I = internode, B = branch in whorl, L = fused microphylls
Cross-section through a strobilus; sporangiophores, with attached sporangia (spore capsules) full of spores, can be discerned.
Strobilus of E. braunii, terminal on an unbranched stem
Equisetaceae
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Equisetaceae, also known as the horsetail family, is a family of ferns and the only surviving family of the order Equisetales, with one surviving genus, Equisetum, comprising about twenty species.
Equisetidae
…most probably up to the Jurassic. Subclass Equisetidae contains a single extant order, Equisetales. This order consists of a single monotypic family, Equisetaceae, with one genus Equisetum. Equisetum has about 20 species. The extant horsetails represent a tiny fraction of horsetail diversity in the past. There…
Equisetum arvense 001