Bigleaf Snakeroot (Orbexilum macrophyllum)
The Bigleaf Snakeroot aka. Large-leaved Leather-root was described in 1919; it is endemic to the Tyron Mountains in North Carolina, USA.
The species has never been found since 1899 when the type material was collected; it may well be extinct.
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The photo below shows a congeneric taxon, the Eastern Sampson’s Snakeroot (Orbexilum psoralioides(Walter) Vincent), photographed in North Carolina, USA.
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edited: 22.01.2024