Wrong, Ben! There is a depression just north of Sumatra, Florida that is very wet. In this depression is a solid carpet of p. planifolia, red as beets, and p. ionantha. They are growing side by side in the very same conditions. The plants are 8 and 10 inches across, and grow in this depression into the water that flows through it. As much as 4 and 6 inches deep! An occasional 12 inch specimen is found, but 8 and 10 are the usual sizes. The plants growing submerged are almost all very large. They love the wet, and the moving water. A healthy bog is healthy because of the water that runs through it, pulling good ole oxygen into the soil and through it. This really makes for a healthy bog, and very healthy and happy plants.