Eodeasensis gelidabulbus
As populations of Eodeasensis folufusus spread over the river systems of Zone 15, some began to encounter areas where the water gets cold enough to freeze over during the winter months. The ice would at best diffract light, and could potentially block some of the sun's rays. Facing these harsher conditions than the tributaries farther south, these populations developed new adaptations to tolerate these conditions resulting in them speciating.
2 meters long
Eodaesensis gelidabulbus is similar to its ancestor as they still have the high abundance of fronds with large amounts of leaves to soak up extra sunlight. They also reproduce in a similar fashion, either sexually by dropping seeds or asexually via carpeting and the rooting of broken stems. The main difference is the development of a bulb from the roots. The bulb serves the function as a energy reserve, which builds up over the summer as the polyph gets energy from sunlight, to then be put in use during the winter. During the colder winter months, Eodeasensis gelidabulbus enters a state of lowered metabolic activity, relying on the energy reserves they collected during the summer stored in the bulb and less efficient photosynthesis. In the southern tributaries, the milder temperatures make the bulb unnecessary and results in the species getting pushed out by Eodeasensis folufusus who are more efficient in warmer temperatures.