Paper is made of all sort of things you can think of -

Soft Wood - Like spruce & pine which have a long fibre.

Hard Wood - Short Fibre. Not very suitable for paper making. Gives trouble in barking and chipping. Eucalyptus, Acacia, Albizzia & wattle trees are more suitable hard wood trees for paper making and do have a very high rate of growth.

Grasses - Several types of long grasses like bamboo sabai grass, sarkanda etc. are used.

Straws - In Pakistan rice, wheat straw, bagasse and corn straw are used for paper pulp making. Straw has been reported as suitable for paper making

Cotton Linters - Its a seed hair from cotton plant after extracting cotton. Only small proportion of raw cotton in form of short fibre linters comes directly to paper mills.

Cotton Rags - This gives more strength in paper or paper board.

Linen - Linen fibre is derived from the bast tissue of the stem of the flax plant, cultivated extensively in USA, Russia, Hungary, France, Belgium & Ireland.

Hemp - It comes to paper maker in the form of spinning waste, twine, cordage, ropes etc. Hemp is the bast tissue of an annual shrub growth extensively found in India, Russia & America.

Manila - Fibre occurs in the leaves of a plant of the plantain family that grows in the Phillipines Islands.

Sisal Hamp - The fibre comes from the leaves of the plant Agave Sisalana and is used for making rope & twine.

Waste Paper - The demand of waste paper for manufacturing of paper is increasing every day. Utilization of this would reduce load on demand of fresh fibres. About 80% of the waste paper is used in the manufacture of paper boards. Small scale units depend almost entirely on waste paper as raw material.