carnosa is a plant in the family Scrophulariaceae and is endemic to Western Australia.

carnosa is a spreading shrub growing to 0.3–1 metre (1–3 ft) high.

The lowest petal lobe is narrower that the rest and is turned back below the flower.

Flowering occurs from May to January and is followed by fruit which are oval to almost spherical and 6–7 millimetres (0.2–0.3 in) long.

carnosa occurs in coastal areas between Gregory and Leeman where it grows in sand near saline flats.