Details of waterlily flowers & leaves plus grotesque heads decorate the piers. A particularly important title of Classic nobility was "people of the waterlily".
"In one primary form, the water-lily is shown as a zoomorphic head, with a mirror or Kan-cross in its forehead [right hand photo]. Rootlike projections emerge from the top and stems, and pads and blossoms rise from the root forms."
Schele & Miller, The Blood of Kings, p. 46