Raffia n. : A fibrous material used for tying plants, said to come from the leaves of a palm tree of the genus Raphia.

Example:
What article of clothing is best to wear under a Raffia skirt without showing too much skin?

Taxonomy
Raffia palm, raffia, Species, leaves, Raphia, unranked, De Wild, trees, oil palm, free encyclopedia, plant, Raffia palms, fibres, rope, sap, palm wine, palms, palm frond.

Defination from the web:
Raffia palms (Raphia) are a genus of twenty species of palms native to tropical regions of Africa, especially Madagascar, with one species (R. ... The raffia palm is important in societies such as that of the Province of Bohol in the Philippines, Kuba of Democratic Republic of the Congo, Nso ...