Leaves are 4 to 16 centimetres (1.6 to 6.3 in) long, and nine to 18 millimetres wide, and pinnatifid, with four to nine triangular lobes on each side, before tapering to a fine point.

[4] The type specimen was collected by Alex George on 4 August 1986, from a location on Piawaning Road north-west of Wongan Hills.

[1][2] Early in 2007, Austin Mast and Kevin Thiele transferred all Dryandra taxa to Banksia.

As an interim measure, Mast and Thiele placed all but one Dryandra taxon in Banksia ser.

[5] Banksia wonganensis occurs only in the Wongan Hills and on surrounding rises,[1][2] in the Avon Wheatbelt biogeographic region.

[2] It has been given a rating of "Priority Four - Poorly Known Taxa" on Western Australia's Department of Environment and Conservation's Declared Rare and Priority Flora List, meaning that it has been adequately surveyed, has been determined to be rare, but is apparently not threatened.

The species prefer heavy soils with good drainage, and tolerates full sun or light shade.