Boneflora

The boneflora replaced its ancestor the lakebed redstalk. It has grown to twice its ancestor's size at 4 centimeters tall. It now absorbs calcium from the seawater and through calcification. This gives it a hard exoskeleton trunk. At the top is its red photosynthetic part and then smaller branches bud off with its spores. It can survive both on land or in the water. As it grows it builds more segments, thus appearing like a bony spine. It has been so successful that it also replaced its relative the lakebed redmoss.