 A declared vulnerable species , it occurs in two disjunct populations on granite outcrops along the south coast of Western Australia , with the main population near Albany and a smaller population near Walpole , and is threatened by dieback ( Phytophthora cinnamomi ) and aerial canker ( Zythiostroma ) . B. verticillata is killed by bushfire and new plants regenerate from seed afterwards . Populations take over a decade to produce seed and fire intervals of greater than twenty years are needed to allow the canopy seed bank to accumulate . 
