Glaetond

Glaetond (S."Tallgrass") was a tall grass related to hemp which was grown by the Silvan of Lothlórien and elsewhere.Its long, soft strands, once treated in a manner known only to the elvish Weavers, attained a very high tensile strength. It was used for bowstrings, thread for heavier garments, and was woven to make the silky ropes necessary in the day-to-day life of the tree-dwellers