Pichincha Filmy Fern (Hymenophyllum tenerum)
This species was described in 1861, it apparently is known only from the type material that was collected at an unknown locality in the Pichincha Province of Ecuador.
The species is considered possibly extinct.
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edited: 03.11.2020
Tag Archives: Hymenophyllum
Hymenophyllum helicoideum Sodiro
Helicoid Filmy Fern (Hymenophyllum helicoideum)
The Helicoid Filmy Fern was described in 1892, it is known only from the type material that was collected in the 19th century near San Nicolás in the Pichincha Province of Ecuador.
The type consists of heavily fragmented material that is now kept within a closed pocket on its former herbarium sheet.
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edited: 03.11.2020