That is correct, Morainy. Most of the stem plants can grow in and out of the water as long as the humidity high. The new growth below water will be submersed until they reach the water surface and then eventually they can grow out of the water.
The stiffer stem plants has a easier time pushing out of the water. The softer stem plants tends to trail across the surface before pushing growth out of the water.
Even if the plant was not grown emersed, they can still grow out of the water given the right environment.