P. linearis may refer to: Palafoxia linearis, a plant species in the genus Palafoxia Persoonia linearis, a shrub species in the genus Persoonia Petalonyx linearis, the narrowleaf sandpaper plant, a flowering plant species native to the deserts of eastern California, western Arizona and northwestern Mexico Petrophile linearis, the Pixie mops, a shrub species endemic to Western Australia Phacelia linearis, the linear-leaf scorpion-weed, a plant species in the genus Phacelia native to Canada Philotheca linearis (A.Cunn. ex Endl.) Paul G.Wilson, a plant species in the genus Philotheca Phlegethontia linearis, an extinct amphibian species from the Carboniferous and Permian periods of Europe and North America Prasiola linearis, an algae species in the genus Prasiola Pseudopanax linearis, a plant species in the genus Pseudopanax Pleurothallis linearis, a plant species in the genus Pleurothallis native to Mexico Pteris linearis, Poir., a fern species in the genus Pteris Synonyms Phlomis linearis, a synonym for Phlomis armeniaca, a plant species Puccinia linearis, a synonym for Puccinia graminis, the stem rust, a cereal fungal disease See also Linearis