English: Eucalyptus is the most common short fibre source for pulpwood to make pulp. Eucalyptus globulus and Eucalyptus grandis are the most used varieties in papermaking.[citation needed] The fibre length of Eucalyptus is relatively short and uniform with low coarseness compared with other hardwoods commonly used as pulpwood. The fibres are slender, yet relatively thick walled. This gives uniform paper formation and high opacity that are important for all types of fine papers. The low coarseness is important for high quality coated papers.[Eucalyptus is suitable for many tissue papers as the short and slender fibres gives a high number of fibres per gram and low coarseness contributes to softness.