Yellow flag iris or Iris pseudacorus

The yellow flag iris is a common waterplant that
can be found in marshes and other wet places. It is
easely recognized by its large bright yellow flowers.
If you finf Iris , then reed and cattails are in the near.
The flower of the Yellow flag iris is special and the most
striking part are the large petals (3):

The flowers of the yellow flag iris are fertilized mainly by
bumblebees (honey bee and Bumble bee) and the hoverfly.
These insects are attracted by the honey that is produced
by the petals (5) and by collecting that honey the make contact
with the stamen (4). On the large bright yellow petal-like
sepals or falls on can find a brown spot or beard, guiding
the Bumble bee.

The Iris most important way of reproduction is the
vegetativ way , by use of the short and thick rhizomes.
In this way , a pond can be covered by Iris in some years.
These are the rhizomes of the Iris Germanica .