Grevillea ramosissima, commonly known as fan grevillea, is a shrub species of the family Proteaceae. It is native to south-eastern Australia. Plants usually grow to between 0.3 and 1.5 metres high. The cream or pale yellow conflorescences are conical or cylindrical and appear in spring. The species was first formally described in 1830 by botanist Robert Brown. Brown assigned it the name Anadenia caleyi. In 1855, Swiss botanist Carl Meissner gave the species its current name. Two subspecies are recognised: