 Banksia oligantha , commonly known as Wagin Banksia , is an endangered species in the plant family Proteaceae endemic to south west Western Australia . It belongs to Banksia subg . Isostylis , a subgenus of three closely related Banksia species with dome @-@ shaped heads as inflorescences , rather than characteristic Banksia flower spikes . A shrub or small tree up to 4 m tall , it is found in the Avon Wheatbelt and Esperance Plains bioregions . It is found in the Avon Wheatbelt and Esperance Plains bioregions .
Banksia oligantha is a shrub or small tree that grows