Hainan Ormosia (Ormosia howii)
The Hainan Ormosia is, or rather was, a 10 m tall tree endemic to the island of Hainan, China, that was found only two times, once in 1954 and a second time in 1957, both times in extremely small populations.
The species has not been found since and is very probably extinct now.
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edited: 02.05.2022