 "Banksia epica" grows as a spreading bushy shrub with many branches, from 30 centimetres to 3½ metres (1– ft) tall.It has grey, fissured bark, and dark green, wedge-shaped leaves, to 5 centimetres (–2 in) long and 6 to 15 millimetres (– in) wide, with serrated margins.Flowers occur in "Banksia"s characteristic "flower spike", an inflorescence made up of hundreds of pairs of flowers densely packed in a spiral round a woody axis.