Eremophila longifolia, known by a range of common names including berrigan, is a flowering plant in the figwort family, Scrophulariaceae and is endemic to Australia.

It is a shrub or small tree with weeping branches, long, narrow leaves and brick-red or pink flowers and is found in all Australian mainland states and the Northern Territory.

In Western Australia it mainly occurs between March and November, in southern Queensland during spring and summer but in the Riverina area of New South Wales there is no distinct flowering season.

[6] The fruits which follow are oval to almost spherical in shape, 5–12 mm (0.2–0.5 in) long and are yellow at first, then turn brown and finally black.

[11] Berrigan is the most ubiquitous eremophila in Australia because it can grow in a wide range of soil types and habitats apart from the more humid areas of the east coast.

It was used in initiation ceremonies, to line graves, for tanning water bags and was placed in the headbands of warriors.

In situations where suckering is undesirable or where the plant is to be grown in heavier soils, it can be propagated by grafting onto Myoporum rootstock.

[15][16][17] Eremophila longifolia plants contain compounds which have shown to be effective in controlling bacteria responsible for tooth decay.