Though in dramatic contrast to Victoria, the plant
with the largest leaves, the smallest flowering plant in the
Plant Kingdom is also aquatic. It is Wolffia, commonly
known as Watermeal, one of the Duckweeds, in the family Lemnaceae.
It generally floats on the surface of the water and the image
above illustrates its size in relation to several plants of Lemna
minor and the image at the left includes a pin.
Each tiny Wolffia plant is a rootless oval body, producing
a pistil (stigma) and a single stamen from a floral cavity in
the side of the body. It doesn't flower often as it reproduces
primarily vegetatively. This is accomplished as the main plant
or "mother frond" produces a "daughter frond"
from one end.
Because the examples in these images were found in Florida,
we presume them to be W. columbiana, native here. They
also match the description and other images of W. columbiana.
We are not certain as several references note that direct comparison
with other Wolffia species is necessary to be sure of