2016-3-1 UPDATE

Hibiscus Hamabo

An air pressure sensor can detect typhoons

The hibiscus hamabo, whose yellow flowers bloom in midsummer, grows in colonies along the coast from the Izu preninsula down to Amami-Oshima Island.
The calyx of the hibiscus hamabo not only keeps parasites out, but has a kind of air pressure sensor at its base that releases fruit into the ocean currents when strong typhoon-like winds blow, according to one theory. [5’26″/Subtitles: Japanese, English]