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The Indian fern (Ceratopteris thalictroides) belongs to the family Parkeriaceae. It is an evergreen fern that is distributed from Fukushima-Fukui Prefecture of Honashu west to Shikoku, Kyushu in Japan and it is widely distributed to the tropical and subtropical areas of the world. This fern grows in paddy fields and gutters, etc., and it is annual plant in Japan. The rhizomes are in water or mud, the sterile fronds are split into biternate to triternate lobes, but when leaving in the air they become rod shaped. The fertile fronds grow high, the fragments are fine, and the fronds are folded to the back side. This fern is being edible as vegetables in Asia and Oceania.
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