abaka
There is an image of manila hemp in related links.
The word manila in the name "manila folder" comes from manila hemp or abaca, from which manila folders were originally made.
A Tea Bag
manila hemp
Manila paper is named after the capital city of the Philippines, Manila. It is traditionally made from Manila hemp fibers, which are sourced from the abacá plant native to the Philippines. The paper's light brown color and durability are reminiscent of the fibers used in its production, hence the name "Manila paper."
The word you are looking for is ABACA.
Not always: manila hemp is a a natural fiber, so is cotton.
'Manila hemp, also known as manilla, is a type of fiber obtained from the leaves of the abacá (Musa textilis), a relative of the banana. It is mostly used for pulping for a range of uses, including speciality papers. It was once used mainly to make manila rope,[1] but this is now of minor importance. Manila envelopes and manila paper take their name from this fibre.[2][3]It is not actually hemp, but named so because hemp was long a major source of fibre, and other fibres were sometimes named after it. The name refers to the capital of the Philippines, one of the main producers of abacá.[2][3]"Source: Wikipedia
The process of creating manila paper is much simpler than the creation of other more high quality paper. Manila paper is made from semi-bleached wood fibers, and it weaker than most other paper. Also manila paper is originated from the Philippines and they created it out of hemp.
Manila hemp, also known as abaca, is a natural fiber that is commonly used to make rope for construction rigging due to its strength, durability, and resistance to saltwater.
Candido Lopez Diaz is said to be the first Filipno inventor having invented a hemp fiber cleaning machine used in fabricating the Manila Hemp Rope, and in 1853 was awarded a gold medal by the Spanish Colonial Government in the Philippine Islands.
The plural form of hemp is hemp.