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Mellowbulbs have spread to inhabit the tropical and subtropical watersheds of Ovi, Talon and Orpington. They also live in the major water courses and riparian zones of the rivers of those regions. They are much like their ancestor in their lack of a vascular system, requirement for a water film on their surface and thin powder to protect from desiccation. They only live in yearly stable water sources and their edges, as they are unable to deal with extended periods without being submerged or in rainfall so as to replace their surface water film. Wet biome species will dry out and die after a few days without water but dry biome species can survive for at least a dozen days without being submerged. They do much better and have many more species in wet tropical regions. Their greatest biodiversity is in wetlands where multiple species may grow in the same area. They have developed a variety of body forms in various habitats but they all share their singular central bulb which stores nutrients.

Reproduction in Mellowbulbs has developed to have the sporophyte and gametophyte stage be interdependent on one another. The gametophyte stage is fully dependent on the sporophyte stage. Zoospores that the sporophyte produce are no longer released but instead fuse with other zoospores the parent produces and forms the gametophyte stage on the surface of the parents bulb. Reproduction then continues much the same as in its ancestor, with gametes being released into the water and fusing to then germinate into new sporophytes.