World’s Smallest Orchid is Only This Big: O

The blossom of the orchid is only 2.1 mm wide – approximately the size of the O in the title of this post.

American scientist Lou Jost found the tiny flower by accident among the roots of a larger plant that he had collected from the Cerro Candelaria reserve in the eastern Andes.

The petals are transparent because they are only one cell thick.

Link.