Wall’s Leptochilus Fern (Leptochilus wallii)
This species is endemic to the island of Sri Lanka where it is known from only a single locality.
The type locality is now destroyed and thus this species is very likely extinct. [1][2]
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References:
[1] Atsushi Ebihara; Christopher Roy Fraser-Jenkins; Barbara S. Parris; Xian-Chun Zhang; Yue-Hong Yang; Wen-Liang Chiou; Ho-Ming Chang; Stuart Lindsay; David Middleton; Masahiro Kato; Titien Ngatinem Praptosuwiryo; Victor B. Amoroso; Julie F. Barcelona; Rajapaksha Haddokara Gedara Ranil; Chan-Ho Park; Noriaki Murakami; Akihiko Hoya: Rare and Threatened Pteridophytes of Asia 1. An Enumeration of Narrowly Distributed Taxa1. Bulletin of the National Museum of Nature and Science, Ser. B 38(3): 93–119. 2012
[2] R. H. G. Ranil; C. R. Fraser-Jenkins; D. K. N. G. Pushpakumara; D. S. A. Wijesundara; B. S. Parris: The endemic pteridophyte flora of Sri Lanka: Taxonomy, geographical distribution and conservation status. Indian Fern Journal 33: 1-36. 2016
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edited: 02.05.2022