Hartweg’s St. John’s Wort (Hypericum hartwegii)  

Hartweg’s St. John’s Wort was described in 1843, it is apparently known only from the type material that was collected in 1841 near the city of Chuquiribamba in the Loja Province of Ecuador.

The species was never recorded again since and is likely extinct.

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edited: 03.11.2020