1 Tala Titan Arum

The titan arum (Amorphophallus titanum) blooms unpredictably — sometimes after a decade of dormancy — and each flowering lasts roughly 48 hours, drawing crowds to botanical gardens worldwide when it occurs. Samoa's choice of titanium as the striking material is a deliberate visual pun: the metal's natural grey approximates the spadix coloration in a way silver never could. This is one of a small run of numismatic titanium issues produced in the mid-2010s as mints explored the metal's unusual surface properties, which resist the toning and oxidation that complicate long-term storage of copper and silver pieces.