El Morrillo Myrtle (Calyptranthes arenicola)  

This species is known only from a small region near Playa El Morrillo in the Pinar del Río Province on the northwestern coast of Cuba.

The species’ name appears in listings of extinct species, thus it is mentioned here as well, unfortunately I could not find out any further information so far.

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edited: 02.11.2020