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Living Cycads are found in the tropical, subtropical and warm temperate regions of both the north and south hemispheres. There are about 305 described species, in 10–12 genera and 2–3 families of Cycads. Cycads are basically woody plants which have roots, a stem, leaves and reproductive structures known as cones. They are frequently confused with palms or ferns, but they are an ancient group of seed plants. |
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Plants are often preserved as fossils. Such fossils may be prehistoric impressions that are many millions of years old, or bits of charcoal that are only a few hundred years old. Prehistoric plants are various groups of plants that lived before recorded history (before about 3500 BC). |
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