Definition of "horsetails" [horsetails]

• Plural form of horsetail. (noun)

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• "Still, if you have ever gathered "horsetails," you will see at once that those trees in the foreground of the picture (Fig. 51), with leaves arranged in stars round the branches, are only larger copies of the little marsh-plants; and the seed-vessels of the two plants are almost exactly the same."
• "Vertical plants such as horsetails, rushes and papyrus are a key element in designing such an environment and one of the loveliest - and lesser known - of these moisture-loving verticals is Baumea rubiginosa 'Variegata,' otherwise known as variegated striped rush."
• "Silica is also important in many cells that require it to retain rigidity in cells walls, such as horsetails or sponges."