| 1. | It is a tetraploid and is grouped in the " Isoetes engelmannii " complex.
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| 2. | Waters of the lake host rare species, some of them even extinct like Isoetes lacustris.
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| 3. | Its leaves were wider and more succulent than modern spacies of " Isoetes ".
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| 4. | Fossilised specimens of " Isoetes beestonii " have been found in rocks dating to the latest Permian.
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| 5. | Furthermore, it world s endangered species listed in IUCN Red List such as Isoetes sinensis Palmer inhabit in Dongbaekdongsan wetland.
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| 6. | "Isoetes toximontana " is an herb which grows in shallow water, very often emerging above the surface.
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| 7. | "Isoetes melanospora " is a small plant growing in mud or shallow water but becoming terrestrial as the ground dries.
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| 8. | It is one of several unrelated species of plants from low nutrient lakes known as isoetids, owing to their superficial similarity to Isoetes.
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| 9. | Unlike living " Isoetes ", " Tomiostrobus " formed closed cones with sporophylls that were distinctly shouldered and woody.
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| 10. | Isoetes engelmannii ", which shares the same common name ), is an aquatic pteridophyte that is widely distributed in the eastern United States.
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