Wooden Kelp

You find a small filecase named "Wooden Kelp". Given its location, it likely is about a local plant, but the filecase in itself appears empty.

Lifespan

> 100 years

Average Height

reaches 10 to 20 meters

Geography distribution
Wooden Kelp is found mostly along the Northern coasts of the Crescent Sea. It lives in relatively shallow waters such as bays, estuaries, and close to the shores. The topmost leaves generally reach the water surface, looking like a form of underwater canopy.
Reproduction
The plant reproduces through spores, that are synchronously emitted by all individuals in a specific region.
Usages The spores are used medicinally as salves. The kelp in itself can be dried, and is used to produce textile, or solid ropes.