Grevillea mucronulata, also known as green spider flower or green grevillea, is a shrub of the family Proteaceae that is endemic to New South Wales in Australia. Described by Robert Brown in 1810, it is found in open sclerophyll forest or woodland around the Sydney region and New South Wales south coast. It grows as a small bush to 3 metres high and wide, with variable foliage and greenish flowers that appear over the cooler months from May to October. The flowers are attractive to birds.