Long-wrist Diplazium Fern (Diplazium longicarpum)
This epiphytic species was described in 1916; it is apparently restricted to the island of Hahajima in the Ogasawara archipelago, Japan.
The fern disappeared during the 1980s due to overcollecting for ornamental uses. [1]
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References:
[1] Tod F. Stuessy; Mikio Ono: Evolution and Speciation of Island Plants. Cambridge University Press 1998
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edited: 10.01.2024
Cordero’s Diplazium Fern was described in 1899; it is known only from the banks of the Río Peripa in the Santo Domingo de los Tsáchilas Province of Ecuador.
This sole known locality is nowadays totally altered by the Daule-Peripa dam and by the use of the land for the cultivation of bananas and cocoa, thus the species might well be extinct.
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However, there is also the possibility that this fern was in fact misidentified and that it is still around.
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edited: 09.08.2022