emergent

A plant whose root system grows underwater, but whose shoot, leaves and flowers grow up and above the water.

Emerging; coming into view or into existence; nascent; new.

Arising unexpectedly, especially if also calling for immediate reaction.

Constituting an emergency.

Taller than the surrounding vegetation.

Having leaves and flowers above the water.

Having gameplay that arises from its mechanics, rather than a linear storyline.

That arises at a higher level than that of its components and is not explainable by the behaviour of said components taken individually; having properties as a whole that are more complex than the properties contributed by each of the components individually.