Pretty Pond flower

Several weeks ago I went to the nursery and asked about plants I could put in my pond.  The folks there gave me two large plants that we dug up from their drainage ditch.  I planted them and topped them with pebbles and stuck them in the pond.  They went through a stage where they looked like they were going to die but I cut one of them back and this one recently shoot this long stem up.  Well today God gave us this lovely bloom.
Thank you Lord.