Candle and firewood banksias are the two most common banksias on the coastal plain. Candle banksia grows up to 10 m tall. Candle-like flower spikes are produced from mid spring, through summer and into autumn. They are held above and outside the foliage. The leaves narrow towards their base, and give the species name, attenuatus “narrowed”, from Latin.
Ref: “Leaf and branch: trees and tall shrubs of Perth” by Robert Powell. Published by the Western Australian Department of Environment and Conservation, 2009.