Grevillea adenotricha is a shrub which is endemic to the north of Western Australia. It has an erect habit, growing to a height of between 0.8 and 2 metres high with leaves which are 45 to 70 mm long and 15 to 25 mm wide. Red flowers generally appear between May and August in the species native range. The species was first formally described by Donald McGillivray in 1986 based on plant material collected from Manning Gorge in 1973. It occurs on sandstone outcrops.