Persoonia longifolia, commonly known as snottygobble, is a species of flowering plant in the family Proteaceae and is endemic to the southwest of Western Australia. It is a shrub or small tree characterised by its weeping foliage, yellow flowers and distinctive flaky bark.

Persoonia, commonly known as geebungs or snottygobbles, is a genus of about one hundred species of flowering plants in the family Proteaceae. Plants in the genus Persoonia are shrubs or small trees usually with smooth bark, simple leaves and usually yellow flowers arranged along a raceme, each flower with a leaf or scale leaf at the base. The fruit is a drupe.