P. mitis may refer to one of the following species:
Animals Problepsis mitis, a species of moth found in Mauritius Pyrausta mitis, a species of moth found in Chile
Plants Persicaria mitis, a species of flowering plant Phyllostachys mitis, a species of bamboo Polytrichadelphus mitis, a species of moss Prunus mitis, a synonym for a type of Plum found in the United States