For one thing the giant club mosses and horsetails were much reduced in extent and finally disappeared, leaving only the immediate ancestors of our present-day forms.
Related to the ancient treelike horsetails were queer vines with slender twining stems, which, judging from their fossil remains, must have been very common.
Judged by either standard the Horsetails and Club Mosses of the Carboniferous were higher than those of our own day, and the same is true of the Mesozoic Cycads.
Within there is a pond, where lank horsetailsgrow thickly, rising from the water.
Note: Commanders are distinguished by the number of horsetails carried before them.
The horsetailsand the club-mosses are also produced from prothallia that are formed above ground.
The Horsetails The horsetails of to-day all belong to the one genus, Equisetum, among the different species of which there is a remarkably close similarity.
The Horsetails commonly propagate themselves in the same way, and it is this which makes them so difficult to eradicate in the garden.
It is usual to refer to these Palaeozoic Horsetailsas Calamites, owing to the fact that they were originally supposed to bear a resemblance to a reed (Calamus).
Owing to the fact that the prothalli of the Horsetails have proved to be excessively difficult to cultivate, the life history has not been so completely worked out as in the case of the Ferns and Club Mosses.
Whilst the Club Mosses and Horsetails are comparatively humble plants, the Ferns have reached a remarkable development in the arboreal species.
It is true that in the cases of the Club Mosses and Horsetails the leaves are small or very poorly developed, but with the Ferns the foliage is often of an advanced type.
Without a doubt the Palaeozoic Horsetails grew into giant plants, sending out branches and developing trunks which in some ways are comparable to those possessed by our trees at the present time.
Although they vary somewhat in size, all the Horsetails are striking plants.
Unlike the Club Mosses, the Horsetails seem to be quite happy in the vicinity of towns, and are often seen at their best on railway embankments and in similar situations.
The spores of the Horsetails are not long in developing after they have settled in a damp situation.
Indeed, the existing Horsetails are, to use a common expression, "putting up such a good fight" that it is certain they will continue to hold their own for many a long day.
Smaller Horsetails (sometimes of a great size, but generally of the modern type) and Club-mosses remain, but are not a conspicuous feature in the landscape.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "horsetails" in a variety of sentences. We hope that you will now be able to make sentences using this word.
