Aruraherba submergus
Aruraherba submergus is a descendant of Aruraherba wetrilli that has become fully aquatic. It was pushed into Zone 31 from intraspecific competition for space. It does not compete directly with the others producers in Zone 31, Carpefloat (Stratunato virenparvus) and Ovalgae (Primophytorus ovalus), both of which are much smaller. Carpefloat grow above them and Ovalgae are small enough to grow in between them.
Aruraherba submergus grows to eighty centimeters (80 cm) in height, the purpose is no longer to avoid getting submerged but now to have better access to sunlight in the water. Aruraherba submergus dealt with the lower amount of oxygen in the water by creating small air pockets within its stem to retain oxygen, allowing gas exhange within the stem and roots and making diffusion easier. This also makes it depend on being submerged more as it is now more prone to drying out. The roots also grow to eighty centimeters (80 cm) in depth as moist soil holds less nutrients. As in Aruraherba wetrilli, the roots can connect to other members of their species to share nutrients.
It usually takes Aruraherba submergus fifteen to seventeen weeks (15 - 17 wks) to grow to its full height depending on the amount of sunlight and nutrients in the soil, although those closest to the surface in areas with lots of sunlight may grow in only fourteen weeks (14 wks). Polyph growth is typically slower than its ancestor since it forms the air pockets within the stem. It can reproduce with spreading runners and also via seed pods. The seed pods are not carried by the wind as the water weighs them down but river currents may still carry them to new places. The seed fluff instead helps seeds to attach to the river's sediment, where they will then grow.
