Banksia ilicifolia, commonly known as holly-leaved banksia, is a tree in the family Proteaceae. Endemic to southwest Western Australia, it belongs to "Banksia" subg. "Isostylis", a subgenus of three closely related "Banksia" species with inflorescences that are dome-shaped heads rather than characteristic "Banksia" flower spikes. It is generally a tree up to tall with a columnar or irregular habit. Both the scientific and common names arise from the similarity of its foliage to that of the English holly "Ilex aquifolium"; the glossy green leaves generally have very prickly serrated margins, although some plants lack toothed leaves. The inflorescences are initially yellow but become red-tinged with maturity; this acts as a signal to alert birds that the flowers have opened and nectar is available.