Persoonia longifolia, commonly known as snottygobble,[2] is a species of flowering plant in the family Proteaceae and is endemic to the southwest of Western Australia.

[3] Snottygobble is found in the southwest of Western Australia within 70 km (43 mi) of the coast between Albany and the southeastern edges of Perth.

Young branches are often damaged by larvae of the tip-boring Ptyssoptera moth and by birds including the red-tailed black cockatoo (Calyptorhynchus banksii) and Australian ringneck parrot (Barnardius zonarius).

[6] Mature fruit falls from late July to September and are often eaten by wallabies, kangaroos and the bobtail skink (Tiliqua rugosa).

It also has potential in the nursery trade for its symmetrical habit, weeping foliage and textured, flaky bark, but studies have suggested that at least eighteen months of soil burial is required for seed germination.