What is EQUISETALES?

The horsetails. Order of ca 20 species of the genus Equisetum, cosmopolitan except for Australia and New Zealand. Also fossils from the Upper Carboniferous onwards. The sporophyte has roots and rhizomes, and an aerial stem which bears whorls of very small fused leaves and of branches. The stems are photosynthetic. The gametophytes are thalloid and photosynthetic,


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