Recommended ways to use Solish rivergrass

As part of the World Anvil world building Summer Camp, I created the following response to the prompt:: Describe a species in an non-populated area.

At the bottom of the Esle River is a rivergrass that grows long enough in drought that it fills the river with its leaves.  The leaves are green at the top and as you follow them down to the bottom of the riverbank, they are brown.  Healers have found that the leaves from this rivergrass can be used in multiple ways:  as a tea, a medicinal paste, a delicious lettuce/ seaweed, in dyes and in perfumes and incense (once dried).

The rivergrass is called Solish grass.  It grows rapidly through the spring and summer seasons.  In the winter time, if the water freezes, it breaks off and floats free down the river.  It can then be used to make cord.